Power Valve Control Cut-Off Solenoid & Check Valves

1. Disconnect hose at power valve and install vacuum pump at hose.
2. Draw a vacuum with ignition key off.
3. If vacuum drops, check line to check valve and, if line is satisfactory, replace check valve and repeat test.
4. Turn ignition key to "ON". Vacuum should drop.
5. If vacuum does not drop, reconnect hose to power valve and test power valve.