Camaro RS V8-305 5.0L VIN E TBI (1990)
2.
Diaphragm moves in completely. Gauge reads 10-15 in.Hg. (34 - 50 Kp/m2), 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/m2)) to the hose using a hand vacuum pump
and gage. The vacuum reading on the gage should remain steady. If gage 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 throftle 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,
Labor Time:
0.5 hrs., for diagnostic time only
Use existing labor operations for replacement of parts.
