Home » Public Forums » GMCnet » GMC MOTORHOME POWER LOSS PROBLEM (STRICKEN FOR YEARS WITH POWER LOSS-ASKING FOR HELP)
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292440 is a reply to message #292437] |
Fri, 18 December 2015 15:52   |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
|
Senior Member |
|
|
Read here
http://www.gmcmhphotos.com/photos/data/4634/TANK_VENTS1.pdf
On Friday, December 18, 2015, Patrick Fitzmorris
wrote:
> Normally i would not chime in on one of these, but i wanted to say that my
> first thought, reading the description of the symptoms, was that tank vent
> in the wheel well, just like Tom said.
>
> The reasoning for me was that fueling seemed to correlate with the problem,
> and I have heard accounts of fuel exiting through that vent when fueling.
> If fuel can get to it, then fuel can gum it up, or maybe float the ball
> into a position where it will stick...
> On Fri, Dec 18, 2015 at 09:28 Todd Sullivan > wrote:
>
>> As Rob stated a change was made and a problem resulted from the change.
>> Critically check all work which was done immediately prior to the problem
>> BEFORE you try other things to remedy. Did a line get pinched when tanks
> re
>> installed? Might have to partially drop tanks and check for a flat hose.
>> What else had to be removed or disconnected for the tank and line work
> etc.
>> Were the lines hooked back up correctly as far as orientation etc etc.
>>
>> Sully
>> 77 Royale
>> Seattle
>>
>> On Fri, Dec 18, 2015 at 6:56 AM, John R. Lebetski gransport7087@gmail.com
>>>
>> wrote:
>>
>>> Rob, I think I touched on the neg tank pressure thing a ways back as
> did
>>> Tom with the gummed up venting issue. We may be on to something with a
>>> consensus here. There may be other issues caused by the add in filters
>> and
>>> 'fixes' done that need to be undone. I have PMed Stan and weather
>>> permitting hope to at least give a look and listen diagnosis in the
> near
>>> future as he is one hour away. If I can get it to stumble your gas cap
>> test
>>> is first on the list.
>>> --
>>> John Lebetski
>>> Woodstock, IL
>>> 77 Eleganza II
>>> Source America First
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: GMC MOTORHOME POWER LOSS PROBLEM [message #292459 is a reply to message #292162] |
Fri, 18 December 2015 21:03 |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
|
Senior Member |
|
|
Lawrence, sorry for your problems. I feel your pain. You've had some great suggestions from some of the best. However, one thing you mentioned that no one has commented on got my attention.
I spent half of 2016 cussing and wrenching on my GMC. Started out with coughing through the carb on a overhauled 403 with 5K miles on it. The cough ultimately turned out to be a burned exhaust valve. Once that was fixed, the coach just would not run right. I didn't drive it much because it just ran like carp. Low vacuum, erratic idle, etc. CARB WOULD NOT RESPOND TO ADJUSTMENT (Sound familiar). I already have two electric fuel pumps, my tanks are clean, new lines, filters, etc. Compression was excellent. Bought a leak down tester and ran the test. Everything was OK.
Replaced the carb with another GMC pro built carb. Nope ((*&^
Convinced myself it was a wiped cam lobe. Pulled and replaced. Nope. *&&$$^&(
Slipped timing tooth. Pulled and replaced, triple checked and photographed. Nope ((*&%#^&*)(
Some type of bizarre problem with the manifold. Pulled and replaced with aluminum one. Nope **%#()%%%;{>
Has to be the ignition. Replaced, module, pickup coil, coil, dist cap, wires, plugs...surely this was it. Nope **&^$##^()@&^%!())}}:"{|><
I was about ready to scrap it...and I was running out of cuss words.
Then one afternoon I had the other valve cover and happened to notice that the exhaust valves were not level with the intake valves. When I pulled the springs and rockers off and laid a straight edge on the valve stems, it was clear that the exhaust valves were 1/16 to 3/32" higher than the intakes. Pulled the head and all four the the exhaust valves (on the OTHER head than the one that was causing the cough) had eroded in the head. ALL FOUR in 5000 miles. Damnedest thing I've ever seen. Fixed that and the coach runs fine.
In retrospect, the compression test should have shown it but did not BECAUSE at cranking speeds, the sunken heads sealed fine and were breathing enough. But at running speeds, they were not open enough to allow all the exhaust gasses to exit.
I guess what I'm trying to say is that when everything else doesn't make sense start at the beginning.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
|
|
|
|
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292557 is a reply to message #292188] |
Sun, 20 December 2015 11:11 |
TnS.GMC
Messages: 18
Registered: November 2015
Karma: 0
|
Junior Member |
|
|
> WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK
This.
I have a fuel delivery problem I've not run down yet. Have a similar power
loss at speed issue and after a carb rebuild and new fuel pump went to Wally
World for a 6 gal boat tank, feed line, and the auto parts place for about
10' of fuel line. Line goes on the mechanical fuel pump, through the grill,
through the passenger toll window, and onto the tank in front of the door
(23' coach). Ran fine like that for 800+ miles getting her home. 5o miles at
a time between refills, but it got home.
I'm slowly offloading the fuel and burning in my car. Once it gets low
enough I'll pull the tanks and figure out what the issue is. Likely move to
an electrical pump since it gets hot here.
But basic troubleshooting says isolate the sections to isolate the problem.
--
Todd and Susan
'76 23' [slowly becoming an X-] Birchaven
Alleged Mystery Machine
Melbourne, FL
--------- Original Message --------
From: gmclist@list.gmcnet.org
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
Date: 15/12/15 18:25
> Have your frame/body pads collapsed, pinching the fuel line(s)?
>
> THANK YOU FOR THE REPLY
> OTHER THAN ABOVE THE TANKS, THE LINES HAVE BEEN FOLLOWED UP TO THE FRONT
OF THE GMC.
> A SECOND CONSIDERATION IS.... THE POWER LOSS VARIES... IT WILL HAPPEN AT
35 MPH. TRY TO ADUST, THEN MAY SEE THE POWER LOSS AT 45MPH. ANOTHER WRENCH
> IN THE WORKS IS IF I PUNCH THE GAS, SHE WILL REV UP NORMALLY TILL IT GET
TO ABOUT 30-35MPH, THEN THE POWER LOSS OCCURS. --BUT-- IF I PRESS THE GAS
> GENTLY AND SLOWLY INCREASE SPEED, I MAY GET TO 40-45 MPH BEFORE THE POWER
LOSS HAPPENS.
> THE VARIANCE IN SPEED POINTS KIND OF ELIMINATES PINCHED FUEL LINES THOUGH
WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK.
> THANKYOU
> SLC
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
________________________________________________
Message sent using UebiMiau 2.7.9
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292560 is a reply to message #292557] |
Sun, 20 December 2015 11:21 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
Todd,
Are you aware of the drain plugs on each fuel tank. Drivers side front
corner, uses a (5/16"?) allen wrench.
On Sun, Dec 20, 2015 at 10:11 AM, TnS.GMC
wrote:
>> WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK
>
> This.
>
> I have a fuel delivery problem I've not run down yet. Have a similar power
> loss at speed issue and after a carb rebuild and new fuel pump went to
> Wally
> World for a 6 gal boat tank, feed line, and the auto parts place for about
> 10' of fuel line. Line goes on the mechanical fuel pump, through the grill,
> through the passenger toll window, and onto the tank in front of the door
> (23' coach). Ran fine like that for 800+ miles getting her home. 5o miles
> at
> a time between refills, but it got home.
>
> I'm slowly offloading the fuel and burning in my car. Once it gets low
> enough I'll pull the tanks and figure out what the issue is. Likely move to
> an electrical pump since it gets hot here.
>
> But basic troubleshooting says isolate the sections to isolate the problem.
>
> --
> Todd and Susan
> '76 23' [slowly becoming an X-] Birchaven
> Alleged Mystery Machine
> Melbourne, FL
>
>
> --------- Original Message --------
> From: gmclist@list.gmcnet.org
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
> Date: 15/12/15 18:25
>
>> Have your frame/body pads collapsed, pinching the fuel line(s)?
>>
>> THANK YOU FOR THE REPLY
>> OTHER THAN ABOVE THE TANKS, THE LINES HAVE BEEN FOLLOWED UP TO THE FRONT
> OF THE GMC.
>> A SECOND CONSIDERATION IS.... THE POWER LOSS VARIES... IT WILL HAPPEN AT
> 35 MPH. TRY TO ADUST, THEN MAY SEE THE POWER LOSS AT 45MPH. ANOTHER
> WRENCH
>> IN THE WORKS IS IF I PUNCH THE GAS, SHE WILL REV UP NORMALLY TILL IT GET
> TO ABOUT 30-35MPH, THEN THE POWER LOSS OCCURS. --BUT-- IF I PRESS THE GAS
>> GENTLY AND SLOWLY INCREASE SPEED, I MAY GET TO 40-45 MPH BEFORE THE POWER
> LOSS HAPPENS.
>> THE VARIANCE IN SPEED POINTS KIND OF ELIMINATES PINCHED FUEL LINES THOUGH
> WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK.
>> THANKYOU
>> SLC
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>>
>
> ________________________________________________
> Message sent using UebiMiau 2.7.9
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292564 is a reply to message #292188] |
Sun, 20 December 2015 12:52 |
TnS.GMC
Messages: 18
Registered: November 2015
Karma: 0
|
Junior Member |
|
|
> fuel drain plugs
Thanks Bruce. I found those, but both tanks are pretty full. And since I'm
in the process of tearing out the interior I have time to use the fuel 10
gals or so at a time rather than dealing with ~50 gals rushing out that hole
into my yard.
I'm putting a simple elect pump near the selector switch and will go
thorough a boat fuel/water separator. Fill and burn 5 gals worth in the cars
until it gets low enough to open the plug and finish it off.
--
Todd and Susan
'76 23' [slowly becoming an X-] Birchaven
Alleged Mystery Machine
Melbourne, FL
--------- Original Message --------
From: gmclist@list.gmcnet.org
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
Date: 20/12/15 17:22
> Todd,
> Are you aware of the drain plugs on each fuel tank. Drivers side front
> corner, uses a (5/16"?) allen wrench.
>
> On Sun, Dec 20, 2015 at 10:11 AM, TnS.GMC
<tns.gmc@technostockphotos.com>
> wrote:
>
> > >WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK
> >
> > This.
> >
> > I have a fuel delivery problem I've not run down yet. Have a similar
power
> > loss at speed issue and after a carb rebuild and new fuel pump went
to
> > Wally
> > World for a 6 gal boat tank, feed line, and the auto parts place for
about
> > 10' of fuel line. Line goes on the mechanical fuel pump, through the
grill,
> > through the passenger toll window, and onto the tank in front of the
door
> > (23' coach). Ran fine like that for 800+ miles getting her home. 5o
miles
> > at
> > a time between refills, but it got home.
> >
> > I'm slowly offloading the fuel and burning in my car. Once it gets
low
> > enough I'll pull the tanks and figure out what the issue is. Likely
move to
> > an electrical pump since it gets hot here.
> >
> > But basic troubleshooting says isolate the sections to isolate the
problem.
> >
> > --
> > Todd and Susan
> > '76 23' [slowly becoming an X-] Birchaven
> > Alleged Mystery Machine
> > Melbourne, FL
> >
> >
> > --------- Original Message --------
> > From: gmclist@list.gmcnet.org
> > To: gmclist@list.gmcnet.org <gmclist@list.gmcnet.org>
> > Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
> > Date: 15/12/15 18:25
> >
> > > Have your frame/body pads collapsed, pinching the fuel line(s)?
> > >
> > > THANK YOU FOR THE REPLY
> > > OTHER THAN ABOVE THE TANKS, THE LINES HAVE BEEN FOLLOWED UP TO
THE FRONT
> > OF THE GMC.
> > > A SECOND CONSIDERATION IS.... THE POWER LOSS VARIES... IT WILL
HAPPEN AT
> > 35 MPH. TRY TO ADUST, THEN MAY SEE THE POWER LOSS AT 45MPH. ANOTHER
> > WRENCH
> > > IN THE WORKS IS IF I PUNCH THE GAS, SHE WILL REV UP NORMALLY
TILL IT GET
> > TO ABOUT 30-35MPH, THEN THE POWER LOSS OCCURS. --BUT-- IF I PRESS
THE GAS
> > > GENTLY AND SLOWLY INCREASE SPEED, I MAY GET TO 40-45 MPH BEFORE
THE POWER
> > LOSS HAPPENS.
> > > THE VARIANCE IN SPEED POINTS KIND OF ELIMINATES PINCHED FUEL
LINES THOUGH
> > WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK.
> > > THANKYOU
> > > SLC
> > >
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> > >
> > >
> >
> > ________________________________________________
> > Message sent using UebiMiau 2.7.9
> >
> >
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
>
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
> GMC=Got More Class
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
________________________________________________
Message sent using UebiMiau 2.7.9
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292581 is a reply to message #292564] |
Sun, 20 December 2015 20:40 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Yes,The tanks have a drain, however you'll find that lot of the tank drain
have not been touched for 40 years. I am always surprised when our guys are
able to undo the drain.
On Sun, Dec 20, 2015 at 10:52 AM, TnS.GMC
wrote:
>> fuel drain plugs
>
> Thanks Bruce. I found those, but both tanks are pretty full. And since I'm
> in the process of tearing out the interior I have time to use the fuel 10
> gals or so at a time rather than dealing with ~50 gals rushing out that
> hole
> into my yard.
>
> I'm putting a simple elect pump near the selector switch and will go
> thorough a boat fuel/water separator. Fill and burn 5 gals worth in the
> cars
> until it gets low enough to open the plug and finish it off.
>
> --
> Todd and Susan
> '76 23' [slowly becoming an X-] Birchaven
> Alleged Mystery Machine
> Melbourne, FL
>
>
> --------- Original Message --------
> From: gmclist@list.gmcnet.org
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
> Date: 20/12/15 17:22
>
>> Todd,
>> Are you aware of the drain plugs on each fuel tank. Drivers side front
>> corner, uses a (5/16"?) allen wrench.
>>
>> On Sun, Dec 20, 2015 at 10:11 AM, TnS.GMC
> <tns.gmc@technostockphotos.com>
>> wrote:
>>
>> > >WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK
>> >
>> > This.
>> >
>> > I have a fuel delivery problem I've not run down yet. Have a similar
> power
>> > loss at speed issue and after a carb rebuild and new fuel pump went
> to
>> > Wally
>> > World for a 6 gal boat tank, feed line, and the auto parts place for
> about
>> > 10' of fuel line. Line goes on the mechanical fuel pump, through the
> grill,
>> > through the passenger toll window, and onto the tank in front of the
> door
>> > (23' coach). Ran fine like that for 800+ miles getting her home. 5o
> miles
>> > at
>> > a time between refills, but it got home.
>> >
>> > I'm slowly offloading the fuel and burning in my car. Once it gets
> low
>> > enough I'll pull the tanks and figure out what the issue is. Likely
> move to
>> > an electrical pump since it gets hot here.
>> >
>> > But basic troubleshooting says isolate the sections to isolate the
> problem.
>> >
>> > --
>> > Todd and Susan
>> > '76 23' [slowly becoming an X-] Birchaven
>> > Alleged Mystery Machine
>> > Melbourne, FL
>> >
>> >
>> > --------- Original Message --------
>> > From: gmclist@list.gmcnet.org
>> > To: gmclist@list.gmcnet.org <gmclist@list.gmcnet.org>
>> > Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
>> > Date: 15/12/15 18:25
>> >
>> > > Have your frame/body pads collapsed, pinching the fuel line(s)?
>> > >
>> > > THANK YOU FOR THE REPLY
>> > > OTHER THAN ABOVE THE TANKS, THE LINES HAVE BEEN FOLLOWED UP TO
> THE FRONT
>> > OF THE GMC.
>> > > A SECOND CONSIDERATION IS.... THE POWER LOSS VARIES... IT WILL
> HAPPEN AT
>> > 35 MPH. TRY TO ADUST, THEN MAY SEE THE POWER LOSS AT 45MPH.
> ANOTHER
>> > WRENCH
>> > > IN THE WORKS IS IF I PUNCH THE GAS, SHE WILL REV UP NORMALLY
> TILL IT GET
>> > TO ABOUT 30-35MPH, THEN THE POWER LOSS OCCURS. --BUT-- IF I PRESS
> THE GAS
>> > > GENTLY AND SLOWLY INCREASE SPEED, I MAY GET TO 40-45 MPH BEFORE
> THE POWER
>> > LOSS HAPPENS.
>> > > THE VARIANCE IN SPEED POINTS KIND OF ELIMINATES PINCHED FUEL
> LINES THOUGH
>> > WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK.
>> > > THANKYOU
>> > > SLC
>> > >
>> > >
>> > > _______________________________________________
>> > > GMCnet mailing list
>> > > Unsubscribe or Change List Options:
>> > >
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>> > >
>> > >
>> >
>> > ________________________________________________
>> > Message sent using UebiMiau 2.7.9
>> >
>> >
>> >
>> > _______________________________________________
>> > GMCnet mailing list
>> > Unsubscribe or Change List Options:
>> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>> >
>>
>>
>>
>> --
>> Bruce Hart
>> 1976 Palm Beach
>> Milliken, Co
>> GMC=Got More Class
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>>
>
> ________________________________________________
> Message sent using UebiMiau 2.7.9
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292598 is a reply to message #292581] |
Mon, 21 December 2015 07:27 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
I have been fortunate in being able to loosen thedrain plugs from a 73
Canyon Lands, 76 PalmBeach and a 78 Royal without any issues. It can happen
;-)
On Sun, Dec 20, 2015 at 7:40 PM, Jim Kanomata wrote:
> Yes,The tanks have a drain, however you'll find that lot of the tank drain
> have not been touched for 40 years. I am always surprised when our guys are
> able to undo the drain.
>
> On Sun, Dec 20, 2015 at 10:52 AM, TnS.GMC
> wrote:
>
>>> fuel drain plugs
>>
>> Thanks Bruce. I found those, but both tanks are pretty full. And since
> I'm
>> in the process of tearing out the interior I have time to use the fuel 10
>> gals or so at a time rather than dealing with ~50 gals rushing out that
>> hole
>> into my yard.
>>
>> I'm putting a simple elect pump near the selector switch and will go
>> thorough a boat fuel/water separator. Fill and burn 5 gals worth in the
>> cars
>> until it gets low enough to open the plug and finish it off.
>>
>> --
>> Todd and Susan
>> '76 23' [slowly becoming an X-] Birchaven
>> Alleged Mystery Machine
>> Melbourne, FL
>>
>>
>> --------- Original Message --------
>> From: gmclist@list.gmcnet.org
>> To: gmclist@list.gmcnet.org
>> Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
>> Date: 20/12/15 17:22
>>
>>> Todd,
>>> Are you aware of the drain plugs on each fuel tank. Drivers side front
>>> corner, uses a (5/16"?) allen wrench.
>>>
>>> On Sun, Dec 20, 2015 at 10:11 AM, TnS.GMC
>> <tns.gmc@technostockphotos.com>
>>> wrote:
>>>
>>> > >WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK
>>> >
>>> > This.
>>> >
>>> > I have a fuel delivery problem I've not run down yet. Have a
> similar
>> power
>>> > loss at speed issue and after a carb rebuild and new fuel pump
> went
>> to
>>> > Wally
>>> > World for a 6 gal boat tank, feed line, and the auto parts place
> for
>> about
>>> > 10' of fuel line. Line goes on the mechanical fuel pump, through
> the
>> grill,
>>> > through the passenger toll window, and onto the tank in front of
> the
>> door
>>> > (23' coach). Ran fine like that for 800+ miles getting her home.
> 5o
>> miles
>>> > at
>>> > a time between refills, but it got home.
>>> >
>>> > I'm slowly offloading the fuel and burning in my car. Once it gets
>> low
>>> > enough I'll pull the tanks and figure out what the issue is.
> Likely
>> move to
>>> > an electrical pump since it gets hot here.
>>> >
>>> > But basic troubleshooting says isolate the sections to isolate the
>> problem.
>>> >
>>> > --
>>> > Todd and Susan
>>> > '76 23' [slowly becoming an X-] Birchaven
>>> > Alleged Mystery Machine
>>> > Melbourne, FL
>>> >
>>> >
>>> > --------- Original Message --------
>>> > From: gmclist@list.gmcnet.org
>>> > To: gmclist@list.gmcnet.org <gmclist@list.gmcnet.org>
>>> > Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
>>> > Date: 15/12/15 18:25
>>> >
>>> > > Have your frame/body pads collapsed, pinching the fuel
> line(s)?
>>> > >
>>> > > THANK YOU FOR THE REPLY
>>> > > OTHER THAN ABOVE THE TANKS, THE LINES HAVE BEEN FOLLOWED UP
> TO
>> THE FRONT
>>> > OF THE GMC.
>>> > > A SECOND CONSIDERATION IS.... THE POWER LOSS VARIES... IT
> WILL
>> HAPPEN AT
>>> > 35 MPH. TRY TO ADUST, THEN MAY SEE THE POWER LOSS AT 45MPH.
>> ANOTHER
>>> > WRENCH
>>> > > IN THE WORKS IS IF I PUNCH THE GAS, SHE WILL REV UP NORMALLY
>> TILL IT GET
>>> > TO ABOUT 30-35MPH, THEN THE POWER LOSS OCCURS. --BUT-- IF I PRESS
>> THE GAS
>>> > > GENTLY AND SLOWLY INCREASE SPEED, I MAY GET TO 40-45 MPH
> BEFORE
>> THE POWER
>>> > LOSS HAPPENS.
>>> > > THE VARIANCE IN SPEED POINTS KIND OF ELIMINATES PINCHED FUEL
>> LINES THOUGH
>>> > WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK.
>>> > > THANKYOU
>>> > > SLC
>>> > >
>>> > >
>>> > > _______________________________________________
>>> > > GMCnet mailing list
>>> > > Unsubscribe or Change List Options:
>>> > >
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>> > >
>>> > >
>>> >
>>> > ________________________________________________
>>> > Message sent using UebiMiau 2.7.9
>>> >
>>> >
>>> >
>>> > _______________________________________________
>>> > GMCnet mailing list
>>> > Unsubscribe or Change List Options:
>>> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>> >
>>>
>>>
>>>
>>> --
>>> Bruce Hart
>>> 1976 Palm Beach
>>> Milliken, Co
>>> GMC=Got More Class
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>>
>>
>> ________________________________________________
>> Message sent using UebiMiau 2.7.9
>>
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292601 is a reply to message #292598] |
Mon, 21 December 2015 08:08 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
|
Senior Member |
|
|
On Monday, December 21, 2015, Bruce Hart wrote:
> I have been fortunate in being able to loosen thedrain plugs from a 73
> Canyon Lands, 76 PalmBeach and a 78 Royal without any issues. It can happen
Now if you connect them together ( like Jimb did on his old web page)
- you have one tank
- need one sender
- one pump
- no reserve BS
- TBI return point
- just fill and, drive, drive, drive
Now if jim still sold the kit !!!
> ;-)
>
> On Sun, Dec 20, 2015 at 7:40 PM, Jim Kanomata > wrote:
>
>> Yes,The tanks have a drain, however you'll find that lot of the tank
> drain
>> have not been touched for 40 years. I am always surprised when our guys
> are
>> able to undo the drain.
>>
>> On Sun, Dec 20, 2015 at 10:52 AM, TnS.GMC >
>> wrote:
>>
>>>> fuel drain plugs
>>>
>>> Thanks Bruce. I found those, but both tanks are pretty full. And since
>> I'm
>>> in the process of tearing out the interior I have time to use the fuel
> 10
>>> gals or so at a time rather than dealing with ~50 gals rushing out that
>>> hole
>>> into my yard.
>>>
>>> I'm putting a simple elect pump near the selector switch and will go
>>> thorough a boat fuel/water separator. Fill and burn 5 gals worth in the
>>> cars
>>> until it gets low enough to open the plug and finish it off.
>>>
>>> --
>>> Todd and Susan
>>> '76 23' [slowly becoming an X-] Birchaven
>>> Alleged Mystery Machine
>>> Melbourne, FL
>>>
>>>
>>> --------- Original Message --------
>>> From: gmclist@list.gmcnet.org
>>> To: gmclist@list.gmcnet.org >
>>> Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
>>> Date: 20/12/15 17:22
>>>
>>>> Todd,
>>>> Are you aware of the drain plugs on each fuel tank. Drivers side
> front
>>>> corner, uses a (5/16"?) allen wrench.
>>>>
>>>> On Sun, Dec 20, 2015 at 10:11 AM, TnS.GMC
>>> <tns.gmc@technostockphotos.com >
>>>> wrote:
>>>>
>>>> > >WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK
>>>> >
>>>> > This.
>>>> >
>>>> > I have a fuel delivery problem I've not run down yet. Have a
>> similar
>>> power
>>>> > loss at speed issue and after a carb rebuild and new fuel pump
>> went
>>> to
>>>> > Wally
>>>> > World for a 6 gal boat tank, feed line, and the auto parts place
>> for
>>> about
>>>> > 10' of fuel line. Line goes on the mechanical fuel pump, through
>> the
>>> grill,
>>>> > through the passenger toll window, and onto the tank in front of
>> the
>>> door
>>>> > (23' coach). Ran fine like that for 800+ miles getting her home.
>> 5o
>>> miles
>>>> > at
>>>> > a time between refills, but it got home.
>>>> >
>>>> > I'm slowly offloading the fuel and burning in my car. Once it
> gets
>>> low
>>>> > enough I'll pull the tanks and figure out what the issue is.
>> Likely
>>> move to
>>>> > an electrical pump since it gets hot here.
>>>> >
>>>> > But basic troubleshooting says isolate the sections to isolate
> the
>>> problem.
>>>> >
>>>> > --
>>>> > Todd and Susan
>>>> > '76 23' [slowly becoming an X-] Birchaven
>>>> > Alleged Mystery Machine
>>>> > Melbourne, FL
>>>> >
>>>> >
>>>> > --------- Original Message --------
>>>> > From: gmclist@list.gmcnet.org
>>>> > To: gmclist@list.gmcnet.org &
> lt;gmclist@list.gmcnet.org >
>>>> > Subject: Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM
>>>> > Date: 15/12/15 18:25
>>>> >
>>>> > > Have your frame/body pads collapsed, pinching the fuel
>> line(s)?
>>>> > >
>>>> > > THANK YOU FOR THE REPLY
>>>> > > OTHER THAN ABOVE THE TANKS, THE LINES HAVE BEEN FOLLOWED UP
>> TO
>>> THE FRONT
>>>> > OF THE GMC.
>>>> > > A SECOND CONSIDERATION IS.... THE POWER LOSS VARIES... IT
>> WILL
>>> HAPPEN AT
>>>> > 35 MPH. TRY TO ADUST, THEN MAY SEE THE POWER LOSS AT 45MPH.
>>> ANOTHER
>>>> > WRENCH
>>>> > > IN THE WORKS IS IF I PUNCH THE GAS, SHE WILL REV UP
> NORMALLY
>>> TILL IT GET
>>>> > TO ABOUT 30-35MPH, THEN THE POWER LOSS OCCURS. --BUT-- IF I
> PRESS
>>> THE GAS
>>>> > > GENTLY AND SLOWLY INCREASE SPEED, I MAY GET TO 40-45 MPH
>> BEFORE
>>> THE POWER
>>>> > LOSS HAPPENS.
>>>> > > THE VARIANCE IN SPEED POINTS KIND OF ELIMINATES PINCHED
> FUEL
>>> LINES THOUGH
>>>> > WE ARE CONSIDERING TESTING WITH AN EXTERNAL FUEL TANK.
>>>> > > THANKYOU
>>>> > > SLC
>>>> > >
>>>> > >
>>>> > > _______________________________________________
>>>> > > GMCnet mailing list
>>>> > > Unsubscribe or Change List Options:
>>>> > >
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>> > >
>>>> > >
>>>> >
>>>> > ________________________________________________
>>>> > Message sent using UebiMiau 2.7.9
>>>> >
>>>> >
>>>> >
>>>> > _______________________________________________
>>>> > GMCnet mailing list
>>>> > Unsubscribe or Change List Options:
>>>> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>> >
>>>>
>>>>
>>>>
>>>> --
>>>> Bruce Hart
>>>> 1976 Palm Beach
>>>> Milliken, Co
>>>> GMC=Got More Class
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>>
>>>>
>>>
>>> ________________________________________________
>>> Message sent using UebiMiau 2.7.9
>>>
>>>
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>>
>> --
>> Jim Kanomata
>> Applied/GMC, Fremont,CA
>> jimk@appliedairfilters.com
>> http://www.appliedgmc.com
>> 1-800-752-7502
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
> GMC=Got More Class
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292603 is a reply to message #292601] |
Mon, 21 December 2015 08:29 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
And you can join the GMCer who admitted a couple of days ago that I'd
chided him about doing that mod some months ago. Now, having given out of
gas because of having no reserve when needed, he's de-modding. :-)
Ken H.
On Mon, Dec 21, 2015 at 9:08 AM, gene Fisher wrote:
> Now if you connect them together ( like Jimb did on his old web page)
> - you have one tank
> - need one sender
> - one pump
> - no reserve BS
> - TBI return point
> - just fill and, drive, drive, drive
>
> Now if jim still sold the kit !!!
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: GMC MOTORHOME POWER LOSS PROBLEM [message #292604 is a reply to message #292162] |
Mon, 21 December 2015 08:40 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
My coach used to lose power and/or quit after warmup when coming off a light, or slowing for traffic and then beginning to move. After it quit on me in rush hour traffic in downtown Atlanta onther busiest stretch of freeway in the Southeast (I-75 and I 85) I accomplished the following:
Recored the radiator.
Replaced the radiator hoses
Replaced the oil cooler lines
replaced one end of the trans cooler lines.
Added two electric fuel pumps with filters and check valves
Replaced the charcoal canister plumbing
Replaced the crossmember to pump fuel line (Others had already been replaced)
Replaced the carb inlet filter
Tightened the carb mount bolts and top screws
Replaced all the belts
Replaced the fan clutch
Replaced the thermostat
Since I didn't road test after each of these upgrades, I've no idea which were causing the problem and which weren't. However, the coach now runs correctly, idles at lights and traffic jams properly, and pulls away without any histrionics. They all probably needed doing.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292605 is a reply to message #292603] |
Mon, 21 December 2015 08:41 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
|
Senior Member |
|
|
SICK
GMCS run better on the top of the tanks
- my 6 cars have no reserve
-- you are returning to the drain plug
- you can put in a shut off between tanks ( for wierd-dos)
On Monday, December 21, 2015, Ken Henderson wrote:
> And you can join the GMCer who admitted a couple of days ago that I'd
> chided him about doing that mod some months ago. Now, having given out of
> gas because of having no reserve when needed, he's de-modding. :-)
>
> Ken H.
>
>
> On Mon, Dec 21, 2015 at 9:08 AM, gene Fisher > wrote:
>
>> Now if you connect them together ( like Jimb did on his old web page)
>> - you have one tank
>> - need one sender
>> - one pump
>> - no reserve BS
>> - TBI return point
>> - just fill and, drive, drive, drive
>>
>> Now if jim still sold the kit !!!
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] GMC MOTORHOME POWER LOSS PROBLEM [message #292610 is a reply to message #292605] |
Mon, 21 December 2015 10:04 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
|
Senior Member |
|
|
OR you could buy a Manny 50 gallon tank and have one pump/gauge/sender and
throw away a few feet of fuel line and no longer worry about the mysteries
hiding in the stock tanks. What about two 50 gallon tanks?? hmmmmmmmmmmmm.
Sully
77 Royale
Seattle
On Mon, Dec 21, 2015 at 6:41 AM, gene Fisher wrote:
> SICK
>
> GMCS run better on the top of the tanks
> - my 6 cars have no reserve
> -- you are returning to the drain plug
> - you can put in a shut off between tanks ( for wierd-dos)
>
>
> On Monday, December 21, 2015, Ken Henderson
> wrote:
>
>> And you can join the GMCer who admitted a couple of days ago that I'd
>> chided him about doing that mod some months ago. Now, having given out
> of
>> gas because of having no reserve when needed, he's de-modding. :-)
>>
>> Ken H.
>>
>>
>> On Mon, Dec 21, 2015 at 9:08 AM, gene Fisher > > wrote:
>>
>>> Now if you connect them together ( like Jimb did on his old web page)
>>> - you have one tank
>>> - need one sender
>>> - one pump
>>> - no reserve BS
>>> - TBI return point
>>> - just fill and, drive, drive, drive
>>>
>>> Now if jim still sold the kit !!!
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
|
|
|
|
Goto Forum:
Current Time: Sun Sep 29 18:59:59 CDT 2024
Total time taken to generate the page: 0.01794 seconds
|
GMCforum
Search
Help
Register
Login
Home
