My truck will not stay idling. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1964_C10 · 02-20-2017, 07:25 PM

I recently bought a 1964 Chevy C10 short bed fleet side almost all original besides the drivetrain. I can start it and and i have to rev it to keep it alive. It's a 350 Chevy small block with a TH400 transmission. The wiring is awful but I don't think that it's affecting the idling issue. It back fires out of the carb also. Any help is greatly appreciated.

1964_C10 · 02-20-2017, 07:26 PM

My guess is that the air/fuel mixture is to rich and that's resulting in the backfiring out of the carb.

**WorkinLonghorn** · 02-20-2017, 07:31 PM

After it warms up is the problem still the same? Is the choke plate closed when cold?

1964_C10 · 02-20-2017, 07:37 PM

I can't keep it running long enough to get warmed up. The choke plate is closed when cold.

1964_C10 · 02-20-2017, 07:46 PM

The carb is a rochester Quadrajet 4bbl one of the choke plates is closed and one is open.

nail pounder · 02-20-2017, 09:21 PM

Did it ever idle smooth since you've had it? Have you checked the timing?

geezer#99 · 02-20-2017, 09:40 PM

Quote:

Originally Posted by 1964_C10

The carb is a rochester Quadrajet 4bbl one of the choke plates is closed and one is open.

THere's only one choke plate. It's the front one. THe back one is the secondary air door. It's supposed to stay shut until needed.
You likely have no working choke, that's why you need to hold the throttle open to keep it running.
Take some pics for us.
We might see what your choke problem is.

02-20-2017, 07:25 PM	#1
1964_C10 Registered User Join Date: Feb 2017 Location: California Posts: 12	My truck will not stay idling. I recently bought a 1964 Chevy C10 short bed fleet side almost all original besides the drivetrain. I can start it and and i have to rev it to keep it alive. It's a 350 Chevy small block with a TH400 transmission. The wiring is awful but I don't think that it's affecting the idling issue. It back fires out of the carb also. Any help is greatly appreciated.

02-20-2017, 07:26 PM	#2
1964_C10 Registered User Join Date: Feb 2017 Location: California Posts: 12	Re: My truck will not stay idling. My guess is that the air/fuel mixture is to rich and that's resulting in the backfiring out of the carb.

02-20-2017, 07:31 PM	#3
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,883	Re: My truck will not stay idling. After it warms up is the problem still the same? Is the choke plate closed when cold? __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

02-20-2017, 07:37 PM	#4
1964_C10 Registered User Join Date: Feb 2017 Location: California Posts: 12	Re: My truck will not stay idling. I can't keep it running long enough to get warmed up. The choke plate is closed when cold.

02-20-2017, 07:46 PM	#5
1964_C10 Registered User Join Date: Feb 2017 Location: California Posts: 12	Re: My truck will not stay idling. The carb is a rochester Quadrajet 4bbl one of the choke plates is closed and one is open.

02-20-2017, 09:21 PM	#6
nail pounder Registered User Join Date: Aug 2014 Location: Fallbrook CA Posts: 453	Re: My truck will not stay idling. Did it ever idle smooth since you've had it? Have you checked the timing?



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