Quote:
Originally Posted by saint0421
Probable causes:
TB
MAF
Intake system air leak
PVC leak
I say thuroughly check for vacuum leaks, clean TB and MAF, perform the idle air relearn to see if the problem still exists.
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although i'm going to check into all of those possibilities, i'm guessing it's either a bad MAF or dirty throttle body. i have a nismo CAI, and the bypass valve cracked a few weeks ago. it was a few days before i could order a new one and swap the nismo out with the stock intake, and by the time i switched them out i noticed that there was a significant gap between the bypass and the pipe. so more than likely something between the bypass valve and the manifold is bad/dirty because of that mishap.