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.