i have a 96 eclipse gst and a week ago the car started bouncing at idle from 500 to 1800and then threw a check engine light. the code says in in the idle control system like that really helps so i have been trouble shooting all the sensors in the entire system and have come up with no sensors being bad. any ideas of what i might have over looked???????

 

sounds like your idle air controller valve is on the fritz. whats the code number? (P_ _ _ _)

 

its proabbly a p0505 code. idle air controller. my98 gst has the same problem. get a new motor and u wil be fine. i tested mine and it said it worked but it really didnt. get a new one and ur idle will be good as ong as everything else is correct.

 

already replaced that and the tps. anything els it could be?

 

I have a 97 spyder GS and had the same thing happen to it for three months. took it to the auto shop they checked the plug pins at the iac motor strightened one and set the base line idle and its been fine ever sence.

 

Check for vacuum leaks.

 

see i have a nice thing called mitchell on demand so if you got a diagnostic trouble code (dtc) i can look it up and find out what tests you need to run to find out which component that is malfunctioning so if you can get it do it and save your self 65$ per hour