I have a problem with my idle speed, when you first start it, i will idle to 1300rpm, then quickly drop to 1100rpm within just a few seconds, not long after it will drop to 1000rpm....
Here is where the issue comes in.... it takes about 15-20 minutes for the rpm to drop to 850ish. once is there is still doesnt seem to want to drop back to 850, it will stop at 1000rpm before droping back to 850ish.
Not sure whats causing the problem. I recently rebuilt the engine, which means it has a brand new intake gasket, and TPS, filter, and hoses.
Let me say that the idle is smooth and there is no misfire. So since its smooth and there isnt any misfiring, im tempted to say its a sensor but not sure, the only sensor i can think would be the oxygen sensor not reading right.
Thanks for any input