Questions & Answers for: Volkswagen Beetle iac

...valve - http://www.freeengineinfo.com/idle-air-control-valve-replacement.htm The Idle Air Control (IAC) valve controls the engine idle speed and dashpot functions. The valve is located on the side

...indicates a recorded fault have the fault codes read and fix the faults Check, test or clean the IAC valve...it causes general rough idling conditions because of carbon ...

Dies when u let off the gas Put new exhaust on new alternater Air filter and fuel filter,tune up,IAC sensor,dirty throttle body,or need adj.low idle.