About once a week my car will sputter & die when I let off the gas & sometimes while still pressing gas & sometimes the idle fluctuates. We replace idle position sensor & still acts up

Asked by myrahansen Jul 10, 2014 at 05:47 PM about the 1987 Mercury Grand Marquis

Question type: Maintenance & Repair

4 Answers
5,425

Trippmeister answered 10 years ago

Clean your MAP sensor with maf cleaner. Possibly replace the IAC (idle air controll) valve. Any scan codes?

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5,425

Trippmeister answered 10 years ago

Google them. the MAF sensor is on the Air cleaner top, you may need a tamper-proof driver to undo the screws. MAF cleaner is at any auto parts store, it's amazing what that can do sometimes, I had a similar prob. once. The IAC is on the intake manifold somewhere, you may find it on google or utube.

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