2004 Ford Taurus lunges when brakes are applied

2004 ford taurus lunges and speeds engine up when brakes applied

Vacuum leak? Yet no CEL?


Locate the Idle Air Control valve on the throttle body.

With the engine hot/idling, take the handle of a screwdriver and tap on the IAC valve.

If the engine idle speed changes or the engine stalls, replace the IAC valve.