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Old 09-11-2015, 03:16 PM   #1
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Car idle problem

Hey guys. Have my 02 gt and I've noticed a problem that has just started, never seen it before, wondering if I can get your thoughts. When I'm driving and I put the clutch in and brake to stop at a light, the rpms drop down to an uncomfortably low range, about 4-500 rpm. Almost to the point where I have to tap the gas while I'm slowing down to keep it from stalling. Doesn't happen every time but it's defiantly something I've noticed. Thanks guys!


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Old 09-11-2015, 06:11 PM   #2
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I would guess it's the iac bro


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Old 09-11-2015, 06:21 PM   #3
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02gt here. lemme know when you figure it out lol. i sure havent. and everytime i ask someone they think im paranoid. happens more when i have the a/c running i think. you have any mods? all i have is plenum, 70mm throttle body, ram intake, steeda underdrive, and magnaflow x pipe and borla catback. no tune. changed iac twice. (advance autoparts, not oem part). possible battery issue with an optima yellow top, nothing conclusive. i was thinkin fuel pump was a possibility. injectors looked clean as a whistle.

does yours also seem to lose a bit of oomph when its warmed up?
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Old 09-12-2015, 09:20 PM   #4
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I have basically the same setup minus the Pullies but plus the tune. And YES! When hot I defiantly lose oomph. The car is noticeably peppier when it's cold


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Old 09-12-2015, 09:54 PM   #5
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I had this problem but it is a V6 and turns out it was the MAF.

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Old 09-13-2015, 05:23 AM   #6
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Yea I had an idea it's probably a weak maf. Just so expensive to try and see if that's the issue. But it is definitely related to my intake air temps. When those drop, performance is better.

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Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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