92 GSX misfire at idle

[Shamrokk]

My 92 gsx seems to have a misfire at idle. Just bought the car. Ive replaced plugs, iac valve. Retuned tps, and set base timing yo 5deg btdc. Car runs fine once you start driving but idles really rough. Any ideas? Also car will seem to stutter or hesitate if you hit throttle while at idle

 

[boosted99_420]

Check for boost leaks forgot to tell that to ya the other day xD

 

[Apak00]

Yes check for boost leaks you can make a boost leak tester for less than $10.

 

[AlwaysDTF]

yeah, sounds like a vacuum leak or MAF acting funny.

 

[fonzi90Tsi]

I have the same problem. No boost leaks. Gonna check my maf next.

 

[92AWDTalonTSI]

It wouldn't hurt to check the plugs, wires, coils, cam angle sensor, and ECU.