Initial Inspection and Diagnostic Overview

VACUUM HOSE INSPECTION

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.




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

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