Engine - Intermittent High Idle Speed
88pontiac20Bulletin Number: 88-6-77
Reference Number: 836525R
Publish Date: 10/88
INTERMITTENT IDLE SPEED (HIGHER THAN
Subject: NORMAL IDLE-SPEED) INSPECT ELECTRICAL
WIRING CONNECTIONS TO IDLE AIR CONTROL
VALVE AND REPAIR
Models
Affected: 1988 LeMANS
Some of the subject vehicles may exhibit an occasional higher than normal idle speed.
This condition may be caused by a poor electrical connection to the idle air control (IAC) valve or in a few cases, deterioration of the IAC valve bearing.
Corrective action for vehicles exhibiting the described idle condition is to disconnect the electrical wiring connection at the IAC valve and inspect the harness connection terminals for damage and presence of foreign material.
Repair terminals as necessary, following detailed repair procedures in Section 8 of the service manual; remove any foreign material from the connector. Reconnect the IAC valve harness connection to the IAC valve. Following the diagnostics procedure for Code 35 (Code 35 may not have been set due to the idle speed fluctuation existing for less than 20 seconds including the steps described in the Diagnostic Aids verify the correct operation of the IAC valve. Replace valve if test indicates valve operation is incorrect following service manual procedures.
Warranty Information
Labor Operation: T1351
Labor Time : .5 Hours