1G Idle bouncing bad.. (Idle Surging)

[mitsuowner1991]

So when i start my car it jumps to about 2500rpms then dow to 1000rpms then up to like 1500rpms and back down to thousand... any idea what my problem night be? Could the TPS not be in the right spot ?

 

[210 dsm]

Yes could be, or more likely so the idle air control.

 

[o0GuitarKid0o]

I'd bet on the isc or ecu being your culprit.
Can you log ?
What percentage is your tps at? Or volts .
Have you adjusted your idle with the timing connector and obd1 pin grounded ?
What is your isc at idle ? Should be at 30.
Idle stopper switch working and adjusted properly ?
Have you checked for vaccume leaks around the throttle body?
Boost leak test ?

Had a ecu I was testing cause the ISC to act really weird one time. Cant rember what caused it though.
Is your isc plugged in? Lol

 

[mitsuowner1991]

Its def sumthing outta wack on my TB.. the car idled when the throttle boddie was all gunkes up.. i took it off and also to off the ISP and a FIAC so i didnt get any throttble boddie cleaner in them.. only thing is i forgot to mark where the ISC was adjusted to..