Question about 1990 Subaru Legacy
When idling, especially when the car is cold, it will rev up to about 2000 rpm, then back off, almost killing it, before it revs back up again and repeats, over and over.
Check airflow meter, they can sometimes burn out after backfiring. If this is the case the car will struggle to induce air to idle nicely. Once you are up and running things will be fine but when you come to a stop the idle will play up. A burnt out flow meter caused by backfire is the problem.
Posted on Sep 22, 2012
Check air idle control valve may be sticking or stuck.Clean throtlle plate with air intake cleaner and a tooth brush obviously when car is not running
Posted on Nov 13, 2009
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Posted on Jan 02, 2017
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