Odd Idle and Rev Problem 1jz

supramk3man

Supramania Contributor
Jun 26, 2005
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kentucky
Well i changed out the Iacv and the car doesn't just rev up and down now but it still revs higher then normal by around 1000 rpm. Is there any way that the new ecu and my old tps just aren't reading each other like my old ecu. not sure that makes sense. Well what part should i check now, the car never had any problems before the ecu went out so i just don't understand how the TPS or the IAcv has went bad over night.
 

supramk3man

Supramania Contributor
Jun 26, 2005
414
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kentucky
I just changed out TPS and no matter what you do moving it the idle doesn't go down so i'm thinking there maybe something not just right with the other ecu i have been using i will try to find out from Aaron when i should get my other one and will let you guys know what happens.
 

tlo86

Ninja Editor 'Since 05'
Jul 24, 2005
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Dylan JZ;1126464 said:
supra owner complaining about gas prices.. :squint:

:biglaugh::biglaugh::biglaugh:

i get amazing gas mileage too. ive been on the same tank for the past 3 months and still halfway... maybe i should start driving it for once Lol
 

supramk3man

Supramania Contributor
Jun 26, 2005
414
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40
kentucky
Just got my old ecu back in from Aaron and looks like the caps was all that was wrong so far "Knock on Wood". Other then the idle was a little high on other ecu the car was fine.
 

Dylan JZ

一番 King
Oct 18, 2007
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湾岸せん
supramk3man;1131333 said:
Just got my old ecu back in from Aaron and looks like the caps was all that was wrong so far "Knock on Wood". Other then the idle was a little high on other ecu the car was fine.

good for you man.. mine ended up being shorted out. he's still gonna see if he can fix it though.
 

supramk3man

Supramania Contributor
Jun 26, 2005
414
0
16
40
kentucky
I have the other one i was using i just put it on ebay, the car acted fine with it just had a high idle around 1400 rpm but it took gas great and seemed to be fine. the number on my ecu and that was a little different i think that it might by chance have been for a different series 1 1jz and my motor is series 2 if that would make a difference.