I got the throttle body from the salvage yard for 17$ and put it on. Idle surge is gone.The term idle surge is misleading. It should be "fast idle". The only reason it surges is because the idle switch tells the ecu that the car should be at 750 rpm's and it turns off the fuel, then restarts...

I am getting closer!I got my new ISC and the coil read high at about 40 ohms, but I think that's just fine. I removed the old isc and started the car with nothing in there. It ran like crap, of course, but I stuck my finger in the hole to make sure there was no air passing. The car slowly...

I am not an expert, but I am learning.I am going through the same things with my car. I suspect both of our cars have bad FIAV's. Replace the TB and see. This is what I plan to do. I also have a bad isc and I am replacing that first, but I suspect my fiav.But you should try a few other...