SR throttle unsteady

[BebopSR20]

Okay here's my problem. I have an s13 blacktop with fmic, bov, boost controller, safc I, stock ecu(red top). After about 20 minutes of driving my motor starts stuttering when I press the throttle slowly. In neutral I'll hold the throttle at 2000rpm and it will jump around from 1500 to 3000rpm. If I let off, the idle will jump around and usually stall. When I floor it, the car doesn't stutter at all. The motor doesn't always stutter and sometimes it will go away and drive normally. It seems like it's running rich. I replaced the temp sensor to the ecu and that didn't help. I also tried another MAF but the problem didn't go away either. I was thinking about the TPS but wouldn't the problem be constant if that sensor was bad? Any help would be fantastic. The car is becoming a punk to drive because sometimes I have to keep starting the car at every signal. Thanks!

[Hijacker]

i had an odd stuttering problem happen on a fresh swap i helped out on. turned out to be the CAS.

If you think it's an enrichment issue, try changing the O2 sensor as well.

[BebopSR20]

Thanks, I give it a try.

[Cyberkreig]

Dont mean to hash over the obvious.. but had you checked over all your Intercooler pipes? Studdering problems instantly make me think that you are leaking air... checkover all the rubber pipes and hoses that could get 'heat soaked'. Rubber and silicon will soften after the car heatsup..

Its a long shot but.. good luck.