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Initial Inspection and Diagnostic Overview
Vacuum HoseEngine 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.