Idle problem

jo shmo

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For some reason when ever my car reaches it temp. My car car starts to idle high around 1500 sometimes 2000. Ive changed the tps, egr gasket, replaced the IAC valve 3times, and still when it gets to temp it idles high. Ive also checked all the hoses there all in pretty good shaped, what else do I need to look into, also when its in park or neutral my side tach gauge goes crazy but once I put it in drive it goes back to working perfect , so confused :BangHead:
 

Mustang Mark

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my sisters saab has the same problem. never did get around to figuring it out though.
 

vermilion

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coolant sensor on the drivers side intake? that works in conjunction with iat sensor to determine your timing the PCM.
 
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jo shmo

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Vermilion said:
coolant sensor on the drivers side intake? that works in conjunction with iac sensor to determine your timing the PCM.
dude I just checked that and one of the wires to that sensor shows bare wire, right wire it meets the connecter. I taped it up and it still does it , I can turn the car on and off and it fixes the problem for a lil while, should I look in to getting a new temp sensor?
 

duff daddy

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repair and reinsulate that wire and recheck operation, after that there may be a small intake or unmetered air leak at high or operating temps
 
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jo shmo

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Duff Daddy said:
repair and reinsulate that wire and recheck operation, after that there may be a small intake or unmetered air leak at high or operating temps
ok now im search for a new connecter/pigtail its meesed up right were they go in to that connector, I just tried driving it with it disconeccted and it still is around 1200 rpm in all gears, tomarrow ill check the intake man. Gaskets , thanks for the imput , sry if theres misspelling ive been posting from my phone
 
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jo shmo

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- UPDATE-
So after finding out my alternator was bad I swaped it,and it worked ok, till it gets freaking to temp them no matter what the high idle comes back and turning the car on and off wont fix it :dontknow: , and yes I found/ replacedthe pigtail
 

vermilion

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did you plug that sensor back in on the driver's side coolant sensor? if you leave that unplugged your car think its in open loop and runs poopie.
 

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