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Why is Chev 305 backfiring on acceleration?


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Answered 2007-02-19 19:10:33

Check/replace the spark plugs and wires. If you're not going to replace the plugs make sure the gap is correct (should be either .040 or .060) and make sure the plugs are clean of oil or gas. If it still backfires after you replace the plugs/wires check the distributor and the timing.

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