Home » Public Forums » GMCnet » What is the symptom of plugged fuel filters.
| What is the symptom of plugged fuel filters. [message #219341] |
Tue, 20 August 2013 21:43  |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
|
Senior Member |
|
|
Lots of developments:
Yesterday I got new tires for the coach. 225/75-16 rag wall.
I pulled the alternator and had it checked by the old man who's worked on starters and alternators for SIXTY years. Alternator is fine...he ran it on the tester for 10 minutes and the needle never moved.... Still have the flickering. Disconnected the axillary air pump thinking that might be it...no. hummm He requested I bring the coach down to his shop and he'll check things. Wouldn't let me pay him for his time.
Installed the Patterson distributor and wires that came in yesterday. WOW! WOW! HUGE difference right out of the box. Very smooth, noticeable increase in power. Amazing.
Installed the inner fender liners and went for a drive. I'm speechless (and that's really rare for me  ) at how much better the coach rides on the new tires. Vastly quieter and smoother. Even steers better.
It ran so good I took another quick run around the neighborhood before supper...almost didn't make it back.
Just driving through a nearby subdivision...everything fine and then she coughed, and backfired through the carb a few times, then died. Checked to make sure the distributor hadn't moved....no. Still where I'd left it.... (I'd marked the hatch aluminum) Carb has gas. I can see the fuel squirt in the primaries. I can re-crank it but much RPM over 1000 and it coughs and dies. It didn't help that I was on a hill. However, I was able to get it to the top of the hill by repetitively starting and going 10-20 feet before it died. From the hilltop, it was downhill or flat back to my driveway and I made it. (Thank you Lord!)
My buddy thinks the carb is leaning out because a jet is plugged. I've got a rebuild kit and we're going to do the carb tomorrow. Sometimes, it belched flames back through the carb.
However, it struck me that perhaps I have a plugged fuel filter? I actually have two filters. One in the line before the fuel pump and one at the carb. Both have about 2000 miles on them. When the coughing/backfiring started I was on the backup tank which has an electric fuel pump. Thinking the electric pump might be bad, I switched over to the mechanical pump but there was no change in symptoms. I was thinking that if the filter is restricted, it might be letting enough gas through to get some in the bowl after the engine died which might explain why I saw the gas squirt.
Advice requested please.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
|
|
|
|
| Re: What is the symptom of plugged fuel filters. [message #219342 is a reply to message #219341] |
Tue, 20 August 2013 21:54  |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
|
Senior Member |
|
|
| Kerry Pinkerton wrote on Tue, 20 August 2013 22:43 |
Lots of developments:
Yesterday I got new tires for the coach. 225/75-16 rag wall.
I pulled the alternator and had it checked by the old man who's worked on starters and alternators for SIXTY years. Alternator is fine...he ran it on the tester for 10 minutes and the needle never moved.... Still have the flickering. Disconnected the axillary air pump thinking that might be it...no. hummm He requested I bring the coach down to his shop and he'll check things. Wouldn't let me pay him for his time.
Installed the Patterson distributor and wires that came in yesterday. WOW! WOW! HUGE difference right out of the box. Very smooth, noticeable increase in power. Amazing.
Installed the inner fender liners and went for a drive. I'm speechless (and that's really rare for me ) at how much better the coach rides on the new tires. Vastly quieter and smoother. Even steers better.
It ran so good I took another quick run around the neighborhood before supper...almost didn't make it back.
Just driving through a nearby subdivision...everything fine and then she coughed, and backfired through the carb a few times, then died. Checked to make sure the distributor hadn't moved....no. Still where I'd left it.... (I'd marked the hatch aluminum) Carb has gas. I can see the fuel squirt in the primaries. I can re-crank it but much RPM over 1000 and it coughs and dies. It didn't help that I was on a hill. However, I was able to get it to the top of the hill by repetitively starting and going 10-20 feet before it died. From the hilltop, it was downhill or flat back to my driveway and I made it. (Thank you Lord!)
My buddy thinks the carb is leaning out because a jet is plugged. I've got a rebuild kit and we're going to do the carb tomorrow. Sometimes, it belched flames back through the carb.
However, it struck me that perhaps I have a plugged fuel filter? I actually have two filters. One in the line before the fuel pump and one at the carb. Both have about 2000 miles on them. When the coughing/backfiring started I was on the backup tank which has an electric fuel pump. Thinking the electric pump might be bad, I switched over to the mechanical pump but there was no change in symptoms. I was thinking that if the filter is restricted, it might be letting enough gas through to get some in the bowl after the engine died which might explain why I saw the gas squirt.
Advice requested please.
|
Kerry,
Usually a restricted fuel filter will let an engine idle and run at low power, but as soon as you ask it to jump, it will for a moment and then die....
You can often see the acceleration pump squirt with a bad fuel supply because it stores a small amount of fuel just to suck in unsuspecting people.
If it idles, and then dies as soon as you throttle up, that is possibly a plug main jet. If you just take to top off the carburetor you can usually look at the jets and see if there is stuff in the float bowl that shouldn't be there.
Tomorrow is a road day, but I will look in as much as I am able.
Matt
Good luck,
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
|
|
|
|
| Re: [GMCnet] What is the symptom of plugged fuel filters. [message #219343 is a reply to message #219341] |
Tue, 20 August 2013 21:53 |
Jerry Wheeler
Messages: 246
Registered: January 2013
Karma: 2
|
Senior Member |
|
|
Kerry,
Can't help you with the carb, but what brand of tires did you buy??
JR Wheeler 78 Royale NC/OR
On Tue, Aug 20, 2013 at 10:43 PM, Kerry Pinkerton <Pinkertonk@mchsi.com>wrote:
>
>
> Lots of developments:
>
> Yesterday I got new tires for the coach. 225/75-16 rag wall.
>
> I pulled the alternator and had it checked by the old man who's worked on
> starters and alternators for SIXTY years. Alternator is fine...he ran it
> on the tester for 10 minutes and the needle never moved.... Still have the
> flickering. Disconnected the axillary air pump thinking that might be
> it...no. hummm He requested I bring the coach down to his shop and he'll
> check things. Wouldn't let me pay him for his time.
>
> Installed the Patterson distributor and wires that came in yesterday.
> WOW! WOW! HUGE difference right out of the box. Very smooth, noticeable
> increase in power. Amazing.
>
> Installed the inner fender liners and went for a drive. I'm speechless
> (and that's really rare for me 8o ) at how much better the coach rides on
> the new tires. Vastly quieter and smoother. Even steers better.
>
> It ran so good I took another quick run around the neighborhood before
> supper...almost didn't make it back.
>
> Just driving through a nearby subdivision...everything fine and then she
> coughed, and backfired through the carb a few times, then died. Checked to
> make sure the distributor hadn't moved....no. Still where I'd left it....
> (I'd marked the hatch aluminum) Carb has gas. I can see the fuel squirt
> in the primaries. I can re-crank it but much RPM over 1000 and it coughs
> and dies. It didn't help that I was on a hill. However, I was able to get
> it to the top of the hill by repetitively starting and going 10-20 feet
> before it died. From the hilltop, it was downhill or flat back to my
> driveway and I made it. (Thank you Lord!)
>
> My buddy thinks the carb is leaning out because a jet is plugged. I've
> got a rebuild kit and we're going to do the carb tomorrow. Sometimes, it
> belched flames back through the carb.
>
> However, it struck me that perhaps I have a plugged fuel filter? I
> actually have two filters. One in the line before the fuel pump and one at
> the carb. Both have about 2000 miles on them. When the
> coughing/backfiring started I was on the backup tank which has an electric
> fuel pump. Thinking the electric pump might be bad, I switched over to the
> mechanical pump but there was no change in symptoms. I was thinking that
> if the filter is restricted, it might be letting enough gas through to get
> some in the bowl after the engine died which might explain why I saw the
> gas squirt.
>
> Advice requested please.
> --
> Kerry Pinkerton
>
> North Alabama, near Huntsville,
>
> 77 Eleganza II, "The Lady", 403CI, also a 76 Eleganza being re-bodied as
> an Art Deco car hauler
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: What is the symptom of plugged fuel filters. [message #219344 is a reply to message #219341] |
Tue, 20 August 2013 22:01 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
|
Senior Member |
|
|
| Kerry Pinkerton wrote on Tue, 20 August 2013 19:43 |
Lots of developments:
Yesterday I got new tires for the coach. 225/75-16 rag wall.
I pulled the alternator and had it checked by the old man who's worked on starters and alternators for SIXTY years. Alternator is fine...he ran it on the tester for 10 minutes and the needle never moved.... Still have the flickering. Disconnected the axillary air pump thinking that might be it...no. hummm He requested I bring the coach down to his shop and he'll check things. Wouldn't let me pay him for his time.
Installed the Patterson distributor and wires that came in yesterday. WOW! WOW! HUGE difference right out of the box. Very smooth, noticeable increase in power. Amazing.
Installed the inner fender liners and went for a drive. I'm speechless (and that's really rare for me ) at how much better the coach rides on the new tires. Vastly quieter and smoother. Even steers better.
It ran so good I took another quick run around the neighborhood before supper...almost didn't make it back.
Just driving through a nearby subdivision...everything fine and then she coughed, and backfired through the carb a few times, then died. Checked to make sure the distributor hadn't moved....no. Still where I'd left it.... (I'd marked the hatch aluminum) Carb has gas. I can see the fuel squirt in the primaries. I can re-crank it but much RPM over 1000 and it coughs and dies. It didn't help that I was on a hill. However, I was able to get it to the top of the hill by repetitively starting and going 10-20 feet before it died. From the hilltop, it was downhill or flat back to my driveway and I made it. (Thank you Lord!)
My buddy thinks the carb is leaning out because a jet is plugged. I've got a rebuild kit and we're going to do the carb
tomorrow. Sometimes, it belched flames back through the carb.
However, it struck me that perhaps I have a plugged fuel filter? I actually have two filters. One in the line before the fuel pump and one at the carb. Both have about 2000 miles on them. When the coughing/backfiring started I was on the backup tank which has an electric fuel pump. Thinking the electric pump might be bad, I switched over to the mechanical pump but there was no change in symptoms. I was thinking that if the filter is restricted, it might be letting enough gas through to get some in the bowl after the engine died which might explain why I saw the gas squirt.
Advice requested please.
|
A (or two) plugged filter sounds like a reasonable hypothesis Kerry. If it had been a jet, it would not run smoothly at all. There are two jets and if one is plugged, it will be really obvious as it will be trying to run off of one side of the carburetor. I have experienced both scenarios and your symptoms sound like a filter to me.
It's probably a good idea to rebuild the carb anyway, but before you go to all that trouble, pull the filter out of the inlet, cut it open, and see what is inside of it.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
[Updated on: Tue, 20 August 2013 22:01] Report message to a moderator |
|
|
|
| Re: What is the symptom of plugged fuel filters. [message #219345 is a reply to message #219341] |
Tue, 20 August 2013 22:01 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
|
Senior Member |
|
|
Kerry, IT IS NOT UNCOMMON TO PLUG UP THE FILTERS AS THE ETHONAL IN THE FUEL IS CUSHING THE OLD FUEL OFF THE WALLS AND BOTTOM OF THE TANK.
Before you plow into the carb, replace the filters.
Yes the first filter will catch most, but the finer particulets will be pulled through it and land in the second one.
Being a CAFS (certified Air filter specialist) I can assure that.
Keep in mind that the carberator filter will look great as the fuel flows into the inside of that filter and you'll nt see particulets until you cut it and look.
Kerry, if ou need anther Dirty Old Man to model your gorgeous female model, please include me again.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
|
|
|
|
|
|
| Re: [GMCnet] What is the symptom of plugged fuel filters. [message #219353 is a reply to message #219341] |
Tue, 20 August 2013 22:32 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Fuel filter(s). Even my '84 Toyota pickup acted that way when they stopped
up. :-)
Ken H.
On Tue, Aug 20, 2013 at 10:43 PM, Kerry Pinkerton <Pinkertonk@mchsi.com>wrote:
>
>
> Lots of developments:
>
> Yesterday I got new tires for the coach. 225/75-16 rag wall.
>
> I pulled the alternator and had it checked by the old man who's worked on
> starters and alternators for SIXTY years. Alternator is fine...he ran it
> on the tester for 10 minutes and the needle never moved.... Still have the
> flickering. Disconnected the axillary air pump thinking that might be
> it...no. hummm He requested I bring the coach down to his shop and he'll
> check things. Wouldn't let me pay him for his time.
>
> Installed the Patterson distributor and wires that came in yesterday.
> WOW! WOW! HUGE difference right out of the box. Very smooth, noticeable
> increase in power. Amazing.
>
> Installed the inner fender liners and went for a drive. I'm speechless
> (and that's really rare for me 8o ) at how much better the coach rides on
> the new tires. Vastly quieter and smoother. Even steers better.
>
> It ran so good I took another quick run around the neighborhood before
> supper...almost didn't make it back.
>
> Just driving through a nearby subdivision...everything fine and then she
> coughed, and backfired through the carb a few times, then died. Checked to
> make sure the distributor hadn't moved....no. Still where I'd left it....
> (I'd marked the hatch aluminum) Carb has gas. I can see the fuel squirt
> in the primaries. I can re-crank it but much RPM over 1000 and it coughs
> and dies. It didn't help that I was on a hill. However, I was able to get
> it to the top of the hill by repetitively starting and going 10-20 feet
> before it died. From the hilltop, it was downhill or flat back to my
> driveway and I made it. (Thank you Lord!)
>
> My buddy thinks the carb is leaning out because a jet is plugged. I've
> got a rebuild kit and we're going to do the carb tomorrow. Sometimes, it
> belched flames back through the carb.
>
> However, it struck me that perhaps I have a plugged fuel filter? I
> actually have two filters. One in the line before the fuel pump and one at
> the carb. Both have about 2000 miles on them. When the
> coughing/backfiring started I was on the backup tank which has an electric
> fuel pump. Thinking the electric pump might be bad, I switched over to the
> mechanical pump but there was no change in symptoms. I was thinking that
> if the filter is restricted, it might be letting enough gas through to get
> some in the bowl after the engine died which might explain why I saw the
> gas squirt.
>
> Advice requested please.
> --
> Kerry Pinkerton
>
> North Alabama, near Huntsville,
>
> 77 Eleganza II, "The Lady", 403CI, also a 76 Eleganza being re-bodied as
> an Art Deco car hauler
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: What is the symptom of plugged fuel filters. [message #219360 is a reply to message #219341] |
Tue, 20 August 2013 22:58 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
Replace both filters. They are cheap and easy to do. I moved a coach from California back east a couple of years ago. I ended going through three pairs of them to get it here. It was interesting that if I only replaced one of them I could not get it to run. Some of the crap was making through the big first filter and into the second one.
Replace them before you try anything else.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
| Re: What is the symptom of plugged fuel filters. [message #219394 is a reply to message #219341] |
Wed, 21 August 2013 07:12 |
1275gtsport
Messages: 272
Registered: September 2009
Location: Rothesay NB
Karma: 0
|
Senior Member |
|
|
speaking of filters? is it normal to have to remove the carb to get the fuel line to move far enough back to get the filter out? on mine one has to either remove the thermostat housing or the carb to get the fuel line to move out far enough to even completely un-thread from the carb to replace the filter.
Not something I want to do on the side of the road with a hot engine. Yet people talk of changing filters many times while getting the coach home the first time. I did not even know until I had driven over 700 miles that there was no filter at all from the tanks to the carb.
Adam Raeburn
Rothesay, NB
1976 Austin Mini
1977 GMC Palm Beach
---------------------------------------------------
Once you replace everything that is attached to something else. It will all be fixed.
|
|
|
|
| Re: What is the symptom of plugged fuel filters. [message #219397 is a reply to message #219394] |
Wed, 21 August 2013 07:22 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
|
Senior Member |
|
|
Theory is you can remove the fuel filter without removing the carb. But, it is much easier to remove 4 bolts and loosen the carb to release the fuel filter. Fuel filter fitting has a very fine tap and can be ruined very quickly. Use two wrenches, flare if you have one and use no serious muscle on the fitting. Don't forget the small plastic washer.
Carry spare fuel filters.
When the "Marsha Rescue" coach was moved from N.C. to MO, the team that moved it replaced the fuel filter several times, first time after driving about 1/2 mile.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
|
|
|
|
| Re: What is the symptom of plugged fuel filters. [message #219405 is a reply to message #219341] |
Wed, 21 August 2013 08:22 |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
|
Senior Member |
|
|
It APPEARS it was indeed the filters. Although when I cut open the carb filter it was clean inside. That doesn't mean it wasn't blocked by varnish.
I'll drive it shortly and know for sure.
Thanks for the quick response. May go through the carb anyway.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
|
|
|
|
|
|
| Re: [GMCnet] What is the symptom of plugged fuel filters. [message #219423 is a reply to message #219406] |
Wed, 21 August 2013 10:08 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
|
Senior Member |
|
|
| Nelson Wright wrote on Wed, 21 August 2013 06:23 |
Replace the fuel line with the insulated and flexible one from Jim B at the COOP and you won't have a problem.
Nelson Wright
78 Royal rear bath
Sent from my iPhone
On Aug 21, 2013, at 8:12 AM, 1275gtsport@gmail.com <1275gtsport@gmail.com> wrote:
>
>
> speaking of filters? is it normal to have to remove the carb to get the fuel line to move far enough back to get the filter out? on mine one has to either remove the thermostat housing or the carb to get the fuel line to move out far enough to even completely un-thread from the carb to replace the filter.
>
> Not something I want to do on the side of the road with a hot engine. Yet people talk of changing filters many times while getting the coach home the first time. I did not even know until I had driven over 700 miles that there was no filter at all from the tanks to the carb.
>
> --
> Adam Raeburn
> Rothesay, NB
> 1976 Austin Mini
> 1977 GMC Palm Beach
> ---------------------------------------------------
> Once you replace everything that is attached to something else. It will all be fixed.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
http://www.gmccoop.com/Carb-line-new-2.jpg
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
|
|
|
|
| Re: [GMCnet] What is the symptom of plugged fuel filters. [message #219429 is a reply to message #219423] |
Wed, 21 August 2013 10:50 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
Kerry, I am going to go a different direction than everyone else here. You
complained about varying voltage or what I call "spiking" in the alternator
circuit. If that is actually happening, one of those spikes can EASILY kill
the ignition module in your new Paterson distributor. When they fail. they
either go dead alongside the road, never to run again, or they will run
fine until they get nice and warm and then burp, fart, and otherwise mimic
plugged fuel filters or vaporlocking. Electronics do NOT PLAY WELL with
sudden fluctuations in voltage. Ask, Dick Paterson, he will send you some
nightime reading material on this very subject. It has happened to me
several times on different coaches. Frustrating to say the least. Hope you
have solved your problem, but if not, look at the module. ALWAYS carry a
spare one with you, and get that spiking fixed. Something is loose,
corroded, or poorly connected. Shake every connection in the charging
circuit and make everything tight and bright and shiny like a new penny.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Wed, Aug 21, 2013 at 8:08 AM, Carl Stouffer <carljr3b@yahoo.com> wrote:
>
>
> Nelson Wright wrote on Wed, 21 August 2013 06:23
> > Replace the fuel line with the insulated and flexible one from Jim B at
> the COOP and you won't have a problem.
> > Nelson Wright
> > 78 Royal rear bath
> >
> > Sent from my iPhone
> >
> > On Aug 21, 2013, at 8:12 AM, 1275gtsport@gmail.com <
> 1275gtsport@gmail.com> wrote:
> >
> > >
> > >
> > > speaking of filters? is it normal to have to remove the carb to get
> the fuel line to move far enough back to get the filter out? on mine one
> has to either remove the thermostat housing or the carb to get the fuel
> line to move out far enough to even completely un-thread from the carb to
> replace the filter.
> > >
> > > Not something I want to do on the side of the road with a hot engine.
> Yet people talk of changing filters many times while getting the coach home
> the first time. I did not even know until I had driven over 700 miles that
> there was no filter at all from the tanks to the carb.
> > >
> > > --
> > > Adam Raeburn
> > > Rothesay, NB
> > > 1976 Austin Mini
> > > 1977 GMC Palm Beach
> > > ---------------------------------------------------
> > > Once you replace everything that is attached to something else. It
> will all be fixed.
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
> http://www.gmccoop.com/Carb-line-new-2.jpg
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] What is the symptom of plugged fuel filters. [message #219458 is a reply to message #219429] |
Wed, 21 August 2013 14:36 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
G'day,
I second what Nelson noted about the flex line - strip the carb filter threads and you'll wish you had spent the money on the line!
I second what Jim noted about the modules with one caveat, put a new module in the dizzy and go for a ride; if it works properly
remove it and install the original module. That way when the module fails you have a spare that is known to be good!
Regards,
Rob M.
-----Original Message-----
From: James Hupy
Kerry, I am going to go a different direction than everyone else here. You complained about varying voltage or what I call "spiking"
in the alternator circuit. If that is actually happening, one of those spikes can EASILY kill the ignition module in your new
Paterson distributor. When they fail. They either go dead alongside the road, never to run again, or they will run fine until they
get nice and warm and then burp, fart, and otherwise mimic plugged fuel filters or vaporlocking. Electronics do NOT PLAY WELL with
sudden fluctuations in voltage. Ask, Dick Paterson, he will send you some nightime reading material on this very subject. It has
happened to me several times on different coaches. Frustrating to say the least. Hope you have solved your problem, but if not,
look at the module. ALWAYS carry a spare one with you, and get that spiking fixed. Something is loose, corroded, or poorly
connected. Shake every connection in the charging circuit and make everything tight and bright and shiny like a new penny.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Wed, Aug 21, 2013 at 8:08 AM, Carl Stouffer <carljr3b@yahoo.com> wrote:
>
>
> Nelson Wright wrote on Wed, 21 August 2013 06:23
> > Replace the fuel line with the insulated and flexible one from Jim B at
> the COOP and you won't have a problem.
> > Nelson Wright
> > 78 Royal rear bath
> >
> > Sent from my iPhone
> >
> > On Aug 21, 2013, at 8:12 AM, 1275gtsport@gmail.com <
> 1275gtsport@gmail.com> wrote:
> >
> > >
> > >
> > > speaking of filters? is it normal to have to remove the carb to get
> the fuel line to move far enough back to get the filter out? on mine one
> has to either remove the thermostat housing or the carb to get the fuel
> line to move out far enough to even completely un-thread from the carb to
> replace the filter.
> > >
> > > Not something I want to do on the side of the road with a hot engine.
> Yet people talk of changing filters many times while getting the coach home
> the first time. I did not even know until I had driven over 700 miles that
> there was no filter at all from the tanks to the carb.
> > >
> > > --
> > > Adam Raeburn
> > > Rothesay, NB
> > > 1976 Austin Mini
> > > 1977 GMC Palm Beach
> > > ---------------------------------------------------
> > > Once you replace everything that is attached to something else. It
> will all be fixed.
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
> http://www.gmccoop.com/Carb-line-new-2.jpg
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
| Re: [GMCnet] What is the symptom of plugged fuel filters. [message #219474 is a reply to message #219429] |
Wed, 21 August 2013 16:54 |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
|
Senior Member |
|
|
| James Hupy wrote on Wed, 21 August 2013 10:50 |
Kerry, I am going to go a different direction than everyone else here. You
complained about varying voltage or what I call "spiking" in the alternator
circuit. If that is actually happening, one of those spikes can EASILY kill
the ignition module in your new Paterson distributor. When they fail. they
either go dead alongside the road, never to run again, or they will run
fine until they get nice and warm and then burp, fart, and otherwise mimic
plugged fuel filters or vaporlocking. Electronics do NOT PLAY WELL with
sudden fluctuations in voltage. Ask, Dick Paterson, he will send you some
nightime reading material on this very subject. It has happened to me
several times on different coaches. Frustrating to say the least. Hope you
have solved your problem, but if not, look at the module. ALWAYS carry a
spare one with you, and get that spiking fixed. Something is loose,
corroded, or poorly connected. Shake every connection in the charging
circuit and make everything tight and bright and shiny like a new penny.
Jim Hupy
Salem, OR
78 GMC Royale 403
|
Great advice Jim. I recently lost a module and had not drawn the connection. I'll start chasing the gremlin.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
|
|
|
|
| Re: What is the symptom of plugged fuel filters. [message #219481 is a reply to message #219341] |
Wed, 21 August 2013 17:02 |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
|
Senior Member |
|
|
The backfire problem appears solved. Went through the carb...didn't find anything but cleaned it all up, blew out the passages, and it seems to run fine.
I'll move the discussion on chasing the bouncing voltmeter back to the other thread.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
|
|
|
|
Goto Forum:
Current Time: Sun Oct 06 17:44:46 CDT 2024
Total time taken to generate the page: 0.02018 seconds
|
GMCforum
Search
Help
Register
Login
Home
