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i did search, help with idle issues

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Old 11-22-2007, 06:13 PM
  #1  
FivePointOhh
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Default i did search, help with idle issues

im having some idle issues again, i thought i fixed it but im wrong. i did a search but didnt find the answer im looking for.

cold start it will not idle, i can start it, it'll go to 1500 rpms like normal and works its way down then choke out. but if i hold the gas at 1500 rpms for about a minute or so then it will hold its own idle.

how can i tell for sure whats wrong without just replacing parts? im thinkin IAC or MAP sensor(although i dont really know what this does for the idle but it was suggested during my search.)
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Old 11-22-2007, 06:44 PM
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mjr46
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Default RE: i did search, help with idle issues

have you run a koeo/koer test first to make sure the computer doesn't see any problems??
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Old 11-22-2007, 06:49 PM
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Default RE: i did search, help with idle issues

ORIGINAL: mjr46

have you run a koeo/koer test first to make sure the computer doesn't see any problems??
yep, nothing that has anything to do with idle though. i had an egr code but i dont have emissions and another code that doesnt matter. other than that...nothing
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Old 11-22-2007, 09:32 PM
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silver91gt
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Default RE: i did search, help with idle issues

the iac is the valve on the front of the throttle body, it is what controls your idle. What are your mods, I know when I first started modding my car it was like that untill the computer learned how to keep it running.
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Old 11-24-2007, 05:53 PM
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Default RE: i did search, help with idle issues

ORIGINAL: silver91gt

the iac is the valve on the front of the throttle body, it is what controls your idle. What are your mods, I know when I first started modding my car it was like that untill the computer learned how to keep it running.
new wire cap plugs(gapped to 45) rotor, new springs, stock heads cleaned up, ported typhoon intake, ford b-303 cam, mallory ignition coil, sub frame connectors, dual row summit aluminum radiator, 70mm tb and EGR, 73mm C&L MAF, 3g alt swap, full summit exhaustflow mufflers....
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Old 11-24-2007, 06:31 PM
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1fastzook
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Default RE: i did search, help with idle issues

Try cleaning the MAF,IAC and check the TPS voltage.Just curious what rpm does it idle at when it does idle?
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Old 11-24-2007, 06:32 PM
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tmajikman
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Default RE: i did search, help with idle issues

Check for vacuum leaks, either use carb cleaner spray or take it to a shop that has a smoke machine to find any vacuum leaks, if none are found it could still need time to learn how to idle and run as mentioned before.
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Old 11-24-2007, 11:08 PM
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03BottleFedGT
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Default RE: i did search, help with idle issues

manually set the idle and the tps. did that with my old car and it was fine after that.
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Old 11-24-2007, 11:20 PM
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Default RE: i did search, help with idle issues

i set base idle and tps voltage is .98. i sprayed for vac leaks, none to be found and there is no signs of vac leaks anyways. maf is new and i cleaned the sensor, the IAC i cleaned also so well its almost shiney inside. once it does idle it holds strong at 850-900rpms
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Old 11-24-2007, 11:24 PM
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03BottleFedGT
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Default RE: i did search, help with idle issues

sounds like you might just have a bad iac. i would start there.
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