my 2001 eclipse gt 3.0L when i first start it for the day, it doesnt idle smooth. jumps from 600 to 1500 rpms. only does this for maybe a min. it is stock other than a cold air intake.
Sounds like your ISC or idle speed control motor going bad
even though it only does it in the morning? after that it runs great?
I would still say yes indeed.
The litttle black box where the intake tubing runs through, there is a little sensor there hats your problem, try cleaning it up otherwise you have a bad sensor
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