Engine idles fast, runs on at engine shut-off

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Ever since my last oil change, the engine idles at 2000rpm (normal is about 900) and diesels violently at shut-off. Used to be that adding oil would solve this--now it's not. Any ideas where to start looking before I take the car to the shop?

OmniDIYer in Bowie MD

Jan 2, 2010

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What are the best Saturn repair shops?

RepairPal Certified shops can diagnose and repair your 1998 Saturn SL2. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

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Engine idles fast, runs on at engine shut-off

What is your question?

OmniDIYer in Bowie MD

Jan 2, 2010

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danddon Jan 2, 2010

You may have a Service Engine Soon Light on, yes? it is some what common for Saturns to set a P0505 for Idle air Control Motor fault ant the car will idle , really really fast.

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Popular Answer

What are the best Saturn repair shops?

RepairPal Certified shops can diagnose and repair your 1998 Saturn SL2. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.