Ive had this issue for well over a year with no end in sight. The issue is whenever i hit a big bump in the road my car will jerk a bit and then when i take it out of gear the rpms stay around 2k and sometimes jump to 3k. If i rev it then itll jump and slowly drop to 2k. If im rolling in neutral and i hit a bump the rpms will jump up and down. I did a boost leak test and a very small amount of air is passing through the throttle body. Any help is appreciated as i cant stand this issue any more

 

Possibly the idle controllers on the throttle body. See item 1 or 2. Its 13A of your service manual

Just a thought

 

if thats the IAC ive already replaced it twice. Once because it was actually bad and the second time because of this issue but its still ****ing with me

 

Did you ever take it to RRT? Did you ever sway over to the S90? Did you ever log the car?

https://www.evolutionm.net/forums/ev...ird-issue.html

 

once my boostcut issue is fixed its going to raif. I ended up deciding to put the s90 for sale and i have new shaft seals that just got here yesterday and i have no way to log the car as none of my friends or myself have evoscan