Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks


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Joined: Apr 2018
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Tlapse Offline OP
Grease Monkey
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Grease Monkey
Joined: Apr 2018
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My dad restored this 26 Chevy roadster back in the 80's. I kept it running for many years, but it's been garaged for the last 5 years. I just got it running again, but backfires when I try to accelerate.


Here's a link to a video clip where you can barely hear the hesitation and a little pop when the throttle is advanced...



And here's a video clip of it running nicely at idle...




Any advice on how to get it running better?

Last edited by Tlapse; 04/08/23 06:00 PM.
Filling Station - Chevrolet & GMC Reproduction Parts


Filling Station


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Online Happy
ChatMaster - 15,000
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The backfire is most likely due to lean fuel ratio or slow burning fuel/air mixture. My first suggestion is to buy a good aerosol carburetor cleaner and squirt numerous small squirts into every possible place. I prefer Berryman's B-12 but the Wal-Mart brand is good.

If that does not solve the problem. Double check the engine timing and strength of the spark. Modern gasoline burns slower so a few degrees advance will help. So will increasing the spark plug gap a little.


How Sweet the roar of a Chevy four!
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Tlapse Offline OP
Grease Monkey
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Grease Monkey
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Thank you for the suggestion.


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