Thread: is it valve float or timing
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03-27-2010 01:58 PM #1
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is it valve float or timing
hello i just built a nd put a 402 in my chevelle and runs great pulls great until4700 rpm then it acts like it has a rev limiter and falls on its face. its not just one cylinder but all and as soon as it goes below that rpm range it runs fine please help
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Could it be a 10114182? If so, it is a Gen V 454, 4 bolt 1991 (or later). Hope that helps..
GM Engine de-coding