Home » Public Forums » GMCnet » Coach has engine vapors on the road
| Coach has engine vapors on the road [message #323914] |
Fri, 15 September 2017 20:57  |
captjack
Messages: 271
Registered: February 2010
Location: Sebastopol, California
Karma: 1
|
Senior Member |
|
|
When I start my coach, it usually starts OK. I take off and in a few seconds, it starts to stutter. The engine misses and I have little power. If I hold the throttle down full, it'll stutter along at 15 mph in low gear for up to 5 minutes, then things clear and it runs well. This doesn't happen every time, but most times. There is occasionally a little power loss at full throttle.
So, because of the throttle loss, I pulled out the filter on the carb. No noticeable difference.
I have in-tank fuel pumps and changing from one tank to another doesn't make any difference.
So, I'm thinking this may be an ignition problem and I should change the ignitor and the coil. Am I on the right track??
Thanks
Jack Christensen - K6ROW,
'76 Glenbrook/Clasco - "The Silver Bullet",
Sebastopol, CA
|
|
|
|
|
|
| Re: Coach has engine vapors on the road [message #323920 is a reply to message #323917] |
Fri, 15 September 2017 22:55  |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
|
Senior Member |
|
|
Sounds as though it may be the choke out of adjustment or sticking.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
|
|
|
|
| Re: [GMCnet] Coach has engine vapors on the road [message #323921 is a reply to message #323920] |
Fri, 15 September 2017 23:35 |
 |
ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
|
Senior Member |
|
|
The symptoms you describe are like a bad flashback for me. I have nearly no carburetor skills and after determining that my ignition was tip-top I had Jim K replace the manifold.
Then asked them to massage the carb.
Then I bought the full-boat Howell set up and life was good.
Larry Davick
A Mystery Machine
Fremont, Ca
Sent from my iPhone
> On Sep 15, 2017, at 8:55 PM, Hal StClair wrote:
>
> Sounds as though it may be the choke out of adjustment or sticking.
> Hal
> --
> 1977 Royale 101348,
>
> 1977 Royale 101586, Diesel powered,
>
> 1975 Eleganza II, 101230
>
> 1974 Eagle Bus 45',w/slideout
>
> _______________________________________________
> 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
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
|
|
|
|
|
|
| Re: Coach has engine vapors on the road [message #323926 is a reply to message #323914] |
Sat, 16 September 2017 10:29 |
captjack
Messages: 271
Registered: February 2010
Location: Sebastopol, California
Karma: 1
|
Senior Member |
|
|
No one liked my thoughts about changing the coil or ignitor, so I'll return to fuel. Thanks for the idea on the carb. I had thought about it and checked the wiring to the electric choke which was OK, so now I'll check further. Not much I can do about a cracked intake manifold on the road so if that's it, I'll have to live with it until I get home.
Jack, stumbling along in Carson NV.
Jack Christensen - K6ROW,
'76 Glenbrook/Clasco - "The Silver Bullet",
Sebastopol, CA
|
|
|
|
| Re: [GMCnet] Coach has engine vapors on the road [message #323927 is a reply to message #323926] |
Sat, 16 September 2017 10:42 |
|
ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
|
Senior Member |
|
|
Peer,
The carb was worn but ultimately the geek in me wanted the shiny new toys. I'm so glad I did because even though the coach hasn't been used for some time it still fires up with just a crank.
Sent from my iPhone
> On Sep 16, 2017, at 8:29 AM, Jack Christensen wrote:
>
> No one liked my thoughts about changing the coil or ignitor, so I'll return to fuel. Thanks for the idea on the carb. I had thought about it and
> checked the wiring to the electric choke which was OK, so now I'll check further. Not much I can do about a cracked intake manifold on the road so if
> that's it, I'll have to live with it until I get home.
>
> Jack, stumbling along in Carson NV.
> --
> Jack Christensen - K6ROW,
> '76 Glenbrook/Clasco - "The Silver Bullet",
> Sebastopol, CA
>
> _______________________________________________
> 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
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
|
|
|
|
| Re: [GMCnet] Coach has engine vapors on the road [message #323928 is a reply to message #323921] |
Sat, 16 September 2017 10:54 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
Jack, the next time it does that, Stop the coach safely. Open the hatch and
remove the top of the air cleaner. (one wing nut). Observe the position of
the choke plate. It should be standing nearly straight up and down. If it
is closed, that is the problem, overchoking, an adjustment is in order.
Or, quite possibly, some lubrication of the linkage on the passenger side
of the carb is in order. Spray a couple of blasts of wd-40 or some such
stuff, and work the throttle a bit. Should free it up. If you do not know
how to adjust the choke, take it to someone who does. Basic adjustment goes
like this. STONE COLD ENGINE. Remove air cleaner. Press ONLY ONCE on the
gas pedal. You should hear a click, and the choke plate should have snapped
closed. Take your index finger of your dominant hand and lightly push the
choke plate on the rear portion of it. It should move with almost no effort
on slight finger pressure. If it takes considerable pressure, it is
adjusted too tightly. Loosen, (do not remove) the three screws on the black
thermostatic choke coil housing, and unwind the spring until the choke
plate moves towards open. Then, reverse direction until choke plate just
comes to a close. Hold that position and tighten the three screws. That's
it. EZ PZ.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Sep 16, 2017 8:30 AM, "Jack Christensen" wrote:
No one liked my thoughts about changing the coil or ignitor, so I'll return
to fuel. Thanks for the idea on the carb. I had thought about it and
checked the wiring to the electric choke which was OK, so now I'll check
further. Not much I can do about a cracked intake manifold on the road so
if
that's it, I'll have to live with it until I get home.
Jack, stumbling along in Carson NV.
--
Jack Christensen - K6ROW,
'76 Glenbrook/Clasco - "The Silver Bullet",
Sebastopol, CA
_______________________________________________
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
|
|
|
|
|
|
| Re: Coach has engine vapors on the road [message #323931 is a reply to message #323914] |
Sat, 16 September 2017 14:39 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
What Hal said. Look for the simple fixes first.
--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: Coach has engine vapors on the road [message #323937 is a reply to message #323914] |
Sat, 16 September 2017 21:55 |
captjack
Messages: 271
Registered: February 2010
Location: Sebastopol, California
Karma: 1
|
Senior Member |
|
|
Thanks all for guiding me to focus on fuel and not go off into the weeds on ignition.
Jim Hupy's post led me to the solution. Rather than waiting for another event as he suggested, I decided to implement his solution for freeing up the choke which solved the problem. Thanks Jim.
So, back on the road again and back into CA at Georgetown.
But, the adventure continues. Just as I was driving to our friends, I heard a ping and the fan clutch failed, so now I'm listening to it all the time. As far as I know, it's the original. I'm sure replacement is the solution. I know finding the right one is difficult so recommendations are appreciated.
Thanks again for all your help!
Jack Christensen - K6ROW,
'76 Glenbrook/Clasco - "The Silver Bullet",
Sebastopol, CA
|
|
|
|
| Re: Coach has engine vapors on the road [message #323954 is a reply to message #323937] |
Sun, 17 September 2017 14:36 |
JohnS
Messages: 126
Registered: December 2014
Location: Vacaville, CA
Karma: -2
|
Senior Member |
|
|
Jack, at the risk of re-igniting the "fan clutch war", I'll tell you that I have had the best success with the 2797 clutch. I have had a failure of this one too, but less than with others. A good one of these seems to be working well for both the Stretch and the "77. Good luck!
John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
78 Buskirk stretch, "What were we thinking?"
|
|
|
|
| Re: [GMCnet] Coach has engine vapors on the road [message #323955 is a reply to message #323954] |
Sun, 17 September 2017 14:54 |
johnd01
Messages: 354
Registered: July 2017
Location: Sacrameot
Karma: -1
|
Senior Member |
|
|
Have people had success going to an electric temperature controlled fan?
On Sun, Sep 17, 2017 at 12:36 PM, John Shutzbaugh
wrote:
> Jack, at the risk of re-igniting the "fan clutch war", I'll tell you that
> I have had the best success with the 2797 clutch. I have had a failure of
> this one too, but less than with others. A good one of these seems to be
> working well for both the Stretch and the "77. Good luck!
> --
> John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
> 77 Eleganza, bought it new, can't blame PO, and
> 78 Buskirk stretch, "What were we thinking?"
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
*John Phillips*
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Johnd01
John Phillips
Avion A2600 TZE064V101164
Rancho Cordova, CA (Sacramento)
|
|
|
|
Goto Forum:
Current Time: Thu Apr 18 01:51:49 CDT 2024
Total time taken to generate the page: 0.01450 seconds
|
GMCforum
Search
Help
Register
Login
Home
