Diesel Data: Automotive Repair

Purge Port Vacuum Inspection

Purge Port Vacuum Inspection:





1. Disconnect the vacuum hose from the throttle body purge vacuum nipple and connect a hand vacuum pump to the nipple.

Chart:





2. Start the engine and check to see that, after raising the engine speed, vacuum is kept constant regardless of the increased engine speed.

NOTE: If no vacuum is generated, the throttle body purge port may be clogged.