Question about 1984 Buick Regal

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4 brl rochester carb

Backfires when under load

Posted by Anonymous on

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Backfiring is caused by either the firing order being incorrect or the engine timing is incorrect. generally backfiring through the carburetor is caused by incorrect firing order. confirm the distributor is inserted properly and double check firing order beginning with cylinder number 1.

Posted on Mar 01, 2015

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Todd is correct and check that first. Next would be a compression check. Valves can be burnt, or have excessive carbon build up. Weak springs and worn out rocker arms/ push rods. These can cause back fire threw the carb or the exhaust.

Posted on Apr 01, 2015

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