Thumping idle

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11-29-2016, 03:28 PM

38fountained

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Thumping idle

I have a pair of 496 mercruisers. One engine after warming up, especially on return in low power/idle in gear thumps or skips a beat. I suspect a bad IAC from rockauto. Performance seems fine. No issue when first started. Any thoughts??

11-29-2016, 04:03 PM

Sydwayz

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Quote:

Originally Posted by 38fountained

It could be. Do you have a access to a Rinda scanner? There is a full scope IAC test that you can run with a scanner.

11-29-2016, 05:21 PM

38fountained

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Thumping idle

Quote:

Originally Posted by Sydwayz

It could be. Do you have a access to a Rinda scanner? There is a full scope IAC test thatrun with a scanner.

. Yes, got one will run check next time out. Thanks....

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