04-04-2006, 08:57 PM
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Senior Club Cobra Member
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Join Date: Jun 2001
Location: North Metro Atlanta,
GA
Cobra Make, Engine: 2 dr roadster, V-8, 4 spd.
Posts: 2,780
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Not Ranked
I have never been able to get a carb to hold a tune with a blown power valve. If you had a backfire, and are chasing an even idle, I have always found it was a blown valve. As others have said, it is a cheap part. There is also a way to put a "ball bearing" in as a check valve to keep the power valve from blowing out during backfires.
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