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7/20/14, 01:03 PM

kathrync9311

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idle

My car is idling really rough. I held the idle at 1000 rpm let off the gas and it jumped up to 2000 rpm can anyone give an Idea of what's going on?

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7/20/14, 09:09 PM

The Mad Dooby

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Your IAC valve could be on the Fritz. Have you ever cleaned it/replaced it? How many miles on your car? Any recent upgrades to the air or fuel systems on the car?

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7/21/14, 05:48 AM

kathrync9311

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Cleaned it recently but it didn't make a difference haven't replaced it. Way over 145000. And no upgrades. It ran for 2 months without an air filter

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7/21/14, 05:50 AM

kathrync9311

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And it has a knocking noise when idling

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7/21/14, 08:21 AM

The Mad Dooby

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You may have damaged a part of the valve train. But it's best to have a shop check it out. You could also run a code reader and see if anything comes up.

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