Hey can any one help me, in park after the car is warm it revs up to 2grand and will stay their for awhile then will stop and start over. I also notice the Rpm surges when driving. I just change the TPS sensor and the Air Temp sensor. cleaned the Mas Air also and nothing helped.

any sugestions.

 

Very well could be the Opti...had a buddy with the same problem when stopped at a light...you had to hold the brakes to the floor or pop it in neutral to prevent going forward! Check it out with a scanner, his rpm would jump all over the place and the computer was just trying to react.

 

or it could be your IAC

 

i think i changed the IAC is that the sensor in the intake tube after the Mass Air

 

No, that is your iat....intake air temperature sensor......the iac, idle air control valve is located on the bottom of the throttlebody and is held in by 2 screws. You have to remove the throttle body to install it.

 

thanks i will change that tomorow.

 

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