Lemans FWD L4-121 2.0L (1989)
servo. Using a hand held vacuum pump connected to the large port, stroke the pump until the servo diaphragm pulls in and the gage reads 10-20 in.Hg.
(34 - 68 Kp/sq.m). Replace the servo if either of the following conditions occur:
1.
Diaphragm will not move in completely.
2.
Diaphragm moves in completely. Gauge reads 10-15 in. Hg. (34-50 Kp/sq.m), but vacuum decreases quickly (in a good servo the vacuum may
decrease slowly).
Vacuum Release Valve (On Brake Pedal) Check:
Disconnect the vacuum release hose from the servo (large hose). Apply vacuum (10-20 in.Hg.(34-68 Kp/sq.m)) to the hose using a hand vacuum pump
and gauge. The vacuum reading on the gauge should remain steady. If gauge reading does not hold, or leaks down slowly, inspect for a leaking or
misadjusted vacuum release valve (at the brake pedal), or a leaking hose. A leaking vacuum release system will dramatically effect the operation and life
of the servo.
Other items that could affect servo life and operation are:
-
Improper servo cable or rod adjustment;
-
Binding throttle linkage;
-
Loose or bent servo bracket; or
-
Poor electrical connections.
If the previous diagnostic procedures fail to determine the cause of the cruise system intermittent condition, replace the servo.
WARRANTY INFORMATION:
Use Labor Operation T1821, .5 hrs., for diagnostic time only. Use existing labor operations for replacement of parts.