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#459114 07/05/21 10:16 AM
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Baggins Offline OP
Grease Monkey
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I have a 1965 Impala 283, auto, my mother bought new. It was difficult to start after sitting unused some 10 years. I replaced the carb and fuel pump. It now starts and idles, but under any load, like going uphill, it bogs down and the engine dies. What are some fixes I can try...thanks in advance.


charles selkirk
Wilwood Engineering1955-1957

Willwood Engineering

Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188


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First place to look and consider replacing parts is the ignition system. Then engine needs a hot spark particularly when loaded. Most suspect are the points and condenser. I would first clean the points and make sure they have proper gap. Points tend to form an oxide layer when not used. Wife's emery board, striker on match box, nail file, fine sand paper, crisp dollar bill, etc. can be used. Make sure nothing remains after abrading. Moisture can affect the function of the condenser.

The condition of the fuel can also be an issue. Old gas maybe even when diluted with fresh does not burn as well as new.


How Sweet the roar of a Chevy four!
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Crap n gas tamk and gas line preventing full flow of gas.


Gene Schneider
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Consider replacing gas tank , new tanks are not that expense. I have several friends that purchase cars that sat for long periods and had issues with bogging down until they replaced tank(which fixed issue). What happens debris on tank surfaces come loose with new gas a block flow.

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Baggins Offline OP
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Thank you for the really good suggestion.


charles selkirk
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Baggins Offline OP
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Thanks Chipper...I'll try your suggestions.


charles selkirk
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Does the Impala have a two barrel Rochester carburetor? If so a common problem with them is hesitation on acceleration and surging at certain speeds. If bad enough the engine will die. They must be squeaky clean with good parts and adjusted to run well.


How Sweet the roar of a Chevy four!
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Backyard Mechanic
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My guess would be the accelerator pump in the carb. Had a 283, around 1965 that would bog in a heart beat. One of the guys at the Chevy dealer where I worked part time bent the linkage that sat the pump "down" into the carb a little deeper and it never gave me any more problem......but I was running a 4 barrel Rochester. Just food for thought.


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Backyard Mechanic
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Many possibilities, some of them:

(1) partially clogged fuel filter
(2) partially clogged sending unit sock or pickup
(3) old fuel

The accelerator pump, if defective, may cause a bog or hesitation leaving a stop sign. Hesitate, then recover. Doubt that it is causing the issue posted.

My guess would be ALL of 1, 2, and 3 above.

My low compression John Deere won't burn gasoline that is 6 months old until the engine is completely hot. If you have not done so, drain the tank, flush, and pull in fresh fuel.

Jon.


Good carburetion is fuelish hot air

Owner, The Carburetor Shop (in Missouri)

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