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idle problem with new engine

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Old Sep 30, 2010 | 08:47 AM
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Default idle problem with new engine

Hey guys I tried getting my car tuned the other day and when you start driving and come to a stop it starts idling at around 2000 rpm. I have to try and play with the throttle to get it to idle down. I have a jantzer perf 92 mm throttle body. Is it that or the idle air control motor
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Old Sep 30, 2010 | 08:50 AM
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i had the same issue and for me it was a sticking tps sensor. it would get hung up around 8%. changed the sensor and all is well
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Old Sep 30, 2010 | 09:48 AM
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well i just changed the sensor and it is still doing it. I'm still stumped.
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Old Sep 30, 2010 | 10:24 AM
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have you checked the TPS voltage when the car is at idle? The reading should be around 0.52-0.58 when the blade is closed. The lower the number in that # sequence I gave the more the blade is closed at idle, so yours is probably on the higher side of that sequence if not higher than 0.58 even. That is using 20k DC volts and an ohm meter. Let me know if you need help testing the voltage and I will explain how to do it.
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Old Sep 30, 2010 | 12:16 PM
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well I was told when I was getting it tuned that the tps voltage should be at .59v. when you watch it on the computer when the idle starts idling to high it reaches 2% and the adaptive learning doesn't engage. So I'm still stumped any ideas.
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Old Sep 30, 2010 | 12:17 PM
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when the car is at the proper idle it is at .59volts 0%. But if you rev it then it just jumps up and stays until you mess with the gas.
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Old Sep 30, 2010 | 02:26 PM
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try adjusting it back some more... more toward .55 and see what happens.. sounds like the tb is getting too much air.. I am fixing that problem for a buddy right now
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Old Sep 30, 2010 | 03:14 PM
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not something stupid like the cable being to tight/hung up?
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