2001 Mercury cougar rpm's racing in idle, dying at a stop. Already replaced the air control valve. What is it now?

Asked by Lilybug1 Jan 13, 2017 at 12:24 PM about the 2001 Mercury Cougar V6 Hatchback FWD

Question type: Maintenance & Repair

My sons mercury cougar was racing in idle, rpm's would go up. We were  told
to replace the idle air control valve, which we did. It is still doing it and
sometimes at a stop it will die, it didn't seem to help. What is causing it now?

5 Answers
189,445

Paul answered 7 years ago

when you changed the idel air control, you should unhook battery for 10 min, then hook it back up so computer can relearn idle.

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159,075

Bob answered 7 years ago

Did you clean the throttle body when you replaced the IAC? Did you disconnect the battery for a few min after part was replaced?

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Lilybug1 answered 7 years ago

Thanks guys, tried all but it ended up being the idle sensor, which has simalar symptoms. Anther $40-$50 part, easy to replace. Cars running great.

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