S15/T15 4WD P/U V6-262 4.3L VIN W CPI (1992)
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 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:
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Improper servo cable or rod adjustment;
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Binding throttle linkage;
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Loose or bent servo bracket; or
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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, 0.5 hrs., for diagnostic time only. Use existing labor operations for replacement of parts.
NOTE:
Labor Operation is coded to base vehicle coverage in the warranty system.
