| [GMCnet] Sputter n choke [message #251973] |
Wed, 11 June 2014 14:25  |
Tom Whitton
Messages: 235
Registered: February 2004
Location: Paducah, KY
Karma:
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Senior Member |
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Johnny,
I had similar problems when I first bought my GMC 13-years ago. Finding the problem was exasperating. I won't go into that. The trouble turned out to be a clogged Liquid Fuel Separator, located in the left rear wheel well. The little plastic ball inside the thing was stuck closed. I took it off, cleaned and put it back on. At the same time, I replaced the Vapor Canister, located on the frame in front of the right front wheel. My fuel sputtering/quitting problem went away and has not come back. Worth a try.
Tom Whitton
26 foot updated GMC
Paducah, KY
Message: 3
Date: Wed, 11 Jun 2014 10:28:17 -0600
From: Johnny Bridges
Subject: [GMCnet] Sputter n choke
To: gmclist@temp.gmcnet.org
Message-ID:
Content-Type: text/plain; charset="utf-8"
Well, it isn't a sputter, it's a quit. When it's hot, my coach quits - or tries to - when shifting. I found out yesterday, I can >usually< nurse it
back to life with the accelerator pump but not always. This is the syndrome which put me beside the road on the way to Louisville. I redid the fuel
feed, but going over the mountains, it quit on the way to Bean Station. Once cooled off, it took it on in. Now, it just doesn't want to run when it's
warm and shifting. The temp gauge runs square on the quarter mark in the summer, this is up a bit. Last year, it hit nearly half going over
Monteagle but gave no problems and went down on the downhill side. Also went down going to BS coming down the backside of the hill, which makes me
think the cooling system is working. Both times it's quit, I pull the fuel line to the pump input, nothing there. Interestingly, the output line
pulses when the engine's running. Going to Louisville, I pulled the air cleaner and pumped, no gas in the carb, but clear filter.
My thoughts are, it's vapor locking back down the line someplace, or the carb is getting so hot the pressure sends fuel back towards the tank. Or the
pump is dying, or the ignition module gets too hot. I am however open to other ideas.
This weekend is committed to getting my 'travel truck' engine installed and it running. The toad isn't really a good commuter, it's missing many of
the amenities like A/C, an automatic, etc. Once it's going, the GMC will get the tanks pulled out and checked, a new fuel pump, and a new ignition
module. I'll keep the current module as a spare. Hopefully, all of this will highlight whatever's making the thing quit running.
--johnny
'76 23' transmode norris
Braselton ga
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