fluctuating idle

[Boostedexcel]

The engine is completely stock(91 6-bolt, 4G63t) with the exception of a 16g. The car drives perfectly normal except at idle. The vacumn bumps up and down from 20 to 22hg, it almost sounds like I have aftermarket cams. When I first got the car, it would randomly do this...all I had to do, was the turn the car on a off and this would fix the idle. Could it be the junky Ig maf, vacumn leak, or IAC????

 

[diablos991]

The first things I would do are a boost leak test, and checking for vacuum leaks.

 

[iceman21221]

it could be a boost/vac leak or a bad ICS motor. do a boost leak test and see if that solves the problem.

 

[Boostedexcel]

it could be a boost/vac leak or a bad ICS motor. do a boost leak test and see if that solves the problem.

will do, thanks guys....

 

[just2asian]

let me know if you figure it out, because someone i know is having the same issue.