Vacuum Hose Inspection

VACUUM HOSE
Engine coolant temperature : 80 - 95 °C (176 - 205 °F)




1. Disconnect the vacuum hose from the intake manifold purge hose nipple and connect a hand vacuum pump to the nipple.

Start the engine and check that, after raising the engine speed by racing the engine, vacuum remains fairly constant.

Purge Port Vacuum Curve:

NOTE: If there is no vacuum created, it is possible that the intake manifold port may be clogged and require cleaning.