Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Please give me just a couple of minutes to look a few things up. IN the mean time Did you keep the old engine that you took out of your car?
I need to know if you have the old iac?
What I need you to do id start the engine and unplug the iac and then shut the engine off. Then pull the iac out and tell me if the plunger is all the way in or all the way out.
The iac may be stuck in the full open position" all the way in" and not closing off causing the engine to run wide open.
If the iac is not closing it will still run even if you cover the throttle body. The iac lets air in to the intake past the throttle body.