is there a way to check the opti to see if it is starting to go bad? would it pick anything up on a scanner if it was bad? my car has been having a problem idling since it got cold out and it is driving me crazy because the only thing thats not reading normal is the iac valve reading because the engine is idling so low that it is opening the valve all the way and it is still not idling high enough im starting to think opti, but it seems to not have lost power... although if its been bad since i got the car about 6 months ago i wouldnt have noticed a loss.
btw it has a new fuel pump, 02s, and iat sensor
thanx any help is appreciated