Comanche 4WD L4-150 2.5L VIN E TBI (1989)
5.
Warm the sensor to above 85°F. The vacuum should not be maintained by the sensor. Replace the sensor if defective.
REVERSE DELAY VALVE
1.
Remove the vacuum hose from the end of the valve that is not black in color and apply an external vacuum of approximately 2-4 in. Hg.
2.
Using a stopwatch, note the time required for atmospheric pressure to pass through valve and eliminate the vacuum.
3.
Replace the valve if the time required to eliminate the vacuum is less than 4.5 seconds or more than 13.2 seconds.
4.
Install reverse delay valve with the black end toward the air valve vacuum motor.
