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Old 10-10-2018, 10:33 PM   #4
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Join Date: Jun 2017
Location: Walla Walla, WA
Posts: 531
Default Re: Terriable backfiring

Check your GAV. You might be running it too lean. Leaning it out will cause backfiring. Another issue I saw on another person's car was some dirt or something in the distributor causing cross-fire to wrong cylinders. In that case a new distributor body and cap solved the problem.
-Bill G
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