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RPM Oscillation

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Old Jul 27, 2008 | 07:17 PM
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Default RPM Oscillation
At a steady throttle position I have rpm oscillation. Could this be due to a bad idle air control valve? This just started today. I installed a performabuilt tranny yesterday. The rpm goes up and down probably in a 75 rpm jump up and down from what I can see on the tach on hp tuners.
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Old Jul 28, 2008 | 07:01 PM
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bump..
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Old Jul 28, 2008 | 07:35 PM
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75 rpm thats normal i guess
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Old Jul 29, 2008 | 05:33 PM
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Nah, I don't think so. It wasn't doing it before. It's weird as hell.
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Old Jul 29, 2008 | 07:16 PM
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Mine goes up and down reading it on a scanner at idle, usually about 50-60 RPM.
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Old Jul 29, 2008 | 07:17 PM
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Can you hear it when you are driving down the road? It's pretty noticeable. Maybe its my tsp duals?
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Old Jul 29, 2008 | 07:56 PM
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where are the logs??
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Old Jul 29, 2008 | 08:15 PM
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could be a vacuum leak somewhere....bumped with the install?
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Old Jul 30, 2008 | 05:26 PM
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My computer died on me so I had to buy this one and I don't have the logs on this computer. I'll have to get some this weekend.
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