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Old 05-10-2007, 06:06 PM
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Holley Blown Power Valve Symptoms


what are the symptoms of a blown power valve on a holley carb? what problems may it cause?

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Old 05-10-2007, 06:19 PM
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blowing black smoke out the tailpipe and very poor mileage

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Old 05-10-2007, 06:28 PM
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It will turn the plugs sooty black, and the previously mentioned black smoke. That carburetor will be dumping a lot gas, you'll smell it for sure.
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Old 05-10-2007, 06:51 PM
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At an even cruising speed, the engine will usually have a noticable surging going on. Also, at idle, you may see a steady drip,drip,drip from one or both primary nozzles.

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