What are the symptoms of a failing IAC?
What are the symptoms of a failing IAC? Most Common Idle Air Control Valve IssuesClogged. Due to the flow of air in and out of the idle air control valve, it's possible for contaminants to enter the valve chamber. Failing. Trouble Starting. Poor/Rough Idling. Car Starts, Then Dies. Backfiring. Can a bad IAC cause an engine to stall? A faulty IAC can starve the engine of air at idle, resulting in stalling. Engine Won’t Start Although rare, there are instances where a faulty IAC can throw off the air/fuel mixture enough to prevent the engine from starting. What are symptoms...