Question about 2001 Subaru Legacy

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2001 Subaru legacy idle problem

The car drives normally and idles normally, then intermitantly I go to start the car, and it starts but will not idle. I have had the oxygen sensor replaced, and also the mapping sensor replaced, and it still happens intermitantly. To get it going I need to let it cool down, and then rev the engine hard and it starts to run normally again. My mechanic says it is not showing any fault codes,
and is not sure what is causing he problem.

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  • richwen Jan 21, 2009

    Thanks, I have cleaned the idle speed controler, andthe top of the motor with Subaru brand "top end cleaner".

    The car seems to be running a lot better for now.

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Check the IACV (idle air conrol valve) which monitors idle speed. a clean out of one is a good idea periodically either way.

Posted on Jan 19, 2009

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