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Old 07-20-2012, 01:10 PM
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283 CUI Engine Stalls

I'm posting this issue for my "old man" friend who does not use computers!

Make: Chevrolet
Year: 1964
Model: Impala SS
Engine: 283 cui
Tran: 2 speed Auto
Carb: 2 barrel (Original)
Original Milage: 100K

Background:
The car is 100% stock, was driving fine, owner has had car for over 15+ years.

Problem:
Engine starts up fine, warms up with no issues, no stalls during warm-
up.
After driving the car up the block and slows to stop sign, the engine
stalls.
The engine re-starts immediately with no issues, and after traveling
another short distance, and slowing down again for another stop sign,
the engine stalls again, and restarts immediately.
The stalling patterns happens for about 10 mins. of driving, then stops
after that.

Special Notes: If the car is driven thereafter, the stalls do NOT continue.
If the car sits cold for 2 to 3 days, the same thing occurs,
the stalling process repeats!

All vacuum lines were checked, didn't see any issues! The carb is the original carb, never been touched in last 15 years, car has been driven frequently (couple a times a week) during the duration of ownership!

Time to rebuild or purchase a new carb????

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Old 07-20-2012, 01:24 PM
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sometime the idle may be too low after it is warmed up causing it to stall. Bring the idle up a little.
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Old 07-20-2012, 09:20 PM
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remove air cleaner,start car.While it is idling,grasp carb on or near the fuel inlet(for leverage),try to turn the carb both ways.If the idle speed changes then remove carb ,invert,tighten base plate.Check all the screws for torque.Gaskets may have shrunken and need replacement.If you rebuild the carb,check all the parts for wear. Its been a long time but I do remember there were 2 or 3 little parts not in the kit that cause grief.sorry about being vague.
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Old 07-21-2012, 12:45 AM
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Quote:
Originally Posted by 64Joker View Post
I'm posting this issue for my "old man" friend who does not use computers!

Make: Chevrolet
Year: 1964
Model: Impala SS
Engine: 283 cui
Tran: 2 speed Auto
Carb: 2 barrel (Original)
Original Milage: 100K

Background:
The car is 100% stock, was driving fine, owner has had car for over 15+ years.

Problem:
Engine starts up fine, warms up with no issues, no stalls during warm-
up.
After driving the car up the block and slows to stop sign, the engine
stalls.
The engine re-starts immediately with no issues, and after traveling
another short distance, and slowing down again for another stop sign,
the engine stalls again, and restarts immediately.
The stalling patterns happens for about 10 mins. of driving, then stops
after that.

Special Notes: If the car is driven thereafter, the stalls do NOT continue.
If the car sits cold for 2 to 3 days, the same thing occurs,
the stalling process repeats!

All vacuum lines were checked, didn't see any issues! The carb is the original carb, never been touched in last 15 years, car has been driven frequently (couple a times a week) during the duration of ownership!

Time to rebuild or purchase a new carb????
See if there is a choke pull off on the side of the carb. It is a vacuum chamber, shown below (might look different than photo, could be metal). It job is to open the closed choke about 1/4" after the engine starts. This lets in enough air for the engine to run normally until the engine warms up and the choke opens. So w/the engine cold and choke closed (you have to tap the accelerator pedal for the choke to snap shut), start the engine and check to see if the pull off opens the choke as I've described.

If the choke doesn't open that small amount when the engine starts, the pull off is no good and the engine can stall as you describe. Replacements are available from most parts stores. Take the carb number with you or use one of the GM part numbers from the info page linked to below to get a new one, or order a pull off from them. Click photo for info:

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Old 07-21-2012, 05:09 AM
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This reminds me of an old 80;s Fiat i had to trouble shoot a while ago . The car would run for 3k then stop. Restart, drive another 3k and then the same , engine cut out. Restart etc........
New parts had been thrown at it adding up to hundreds. While in the workshop with the car running i noticed that there was only a small amount of exhaust coming out. The baffles in the muffler had collapsed as the car did short trips, cold muffler, heaps of internal rust. Slowly building up back pressure killed the breathing, every 3k.
Your prob sounds carb related as suggested by cobalt 327 who knows heaps. Maybe you have more than one problem. Check the co gas flow out.
Goodluck.
Al.
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