Engine - Unstable Idle/Stall After Running
88chevy22Number: 88-231-6E
Section: 6E
Date: MAY, 1988
Subject: UNSTABLE ENGINE IDLE
Model and Year: 1987-88 CELEBRITY, CAVALIER, CORSICA, BERETTA
MODELS WITH 2.8L (VIN CODE W) ENGINE
TO: ALL CHEVROLET DEALERS
Some models listed above, with a 2.8L engine (VIN Code W), may exhibit driveability concerns such as:
- Engine Not Continuing to Run
- Unstable Idle
- Check Engine light with stored Code 35
These symptoms may be due to customers starting their vehicles while their foot is resting on the accelerator pedal, or may be due to the cruise control cable being adjusted too tight (on vehicles equipped with cruise control).
If customer comments are received concerning the aforementioned driveability concerns, it is recommended that:
1. The cruise control cable be checked for proper adjustment (reference cruise control cable adjustment procedure in section 9-10 of the Service Manual), and
2. The throttle position sensor (TPS) be adjusted to obtain: .67 volts (reference TPS adjustment procedure in Section 6E3 of the Service Manual).
Use applicable labor time and operation number.