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engine rpm drop at idle?

While sitting in neutral and when I rev the engine, as the rpm drops it drops below idle and goes back up to normal idle rpm. When it hits it

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Old 06-04-2013, 05:09 PM   #1 (permalink)
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Default engine rpm drop at idle?

While sitting in neutral and when I rev the engine, as the rpm drops it drops below idle and goes back up to normal idle rpm. When it hits it lowest rpm it sounds like the valves are banging on the cylinders. I know others had this problem before but what can I do to fix this? It doesn't happen all the time. I also made a video that I will upload when I get home.

http://www.youtube.com/watch?v=gv4K2Nfd4vo

Last edited by Cell; 06-05-2013 at 02:54 AM.
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