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04-05-2014, 07:30 PM
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#1 |
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Registered User
Join Date: Nov 2013
Location: HEALDSBURG CA
Posts: 8
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77 GMC carb problems
I ve been having some problems with my truck, i haven't moved it in about 2 months but sometimes when i start it, the choke warms up so i give it a little gas and a few seconds later it shuts off and i cant start it back up. also sometimes if i give it gas too fast it shuts off and sometimes its fine it wont shut off no matter how fast you press the accelerator. please someone help i need a solution to whats wrong with it.
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04-05-2014, 08:25 PM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,702
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Re: 77 GMC carb problems
Take some pics front and both sides.
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04-05-2014, 09:23 PM
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#3 |
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,560
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Re: 77 GMC carb problems
Does it run OK when it warms up?
Does choke close when the engine is cold, and then gradually open?
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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04-05-2014, 09:46 PM
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#4 |
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Registered User
Join Date: Nov 2013
Location: HEALDSBURG CA
Posts: 8
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Re: 77 GMC carb problems
It sometimes runs fine but most of the times i cant even get it out of the garage because it shuts off when i put it in drive or give it gas to fast.
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04-07-2014, 07:33 AM
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#5 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 77 GMC carb problems
I had issues with the backflow valve in my 79 carb,it would come out of place and block the flow,kinda like you describe....
http://67-72chevytrucks.com/vboard/s...d.php?t=579621
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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