EXPERTEC TSB (45-65-02)

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

HIGH IDLE SPEED/HIGH THROTTLE - PEDAL EFFORT ON COLD STARTUP

Model(s): 1988-91 Pontiac Optima

1988-93 Pontiac Lemans

1993 Asuna SE and GT

Bulletin No.: 45-65-02

Date: 01/26/1995

SUBJECT

High Idle Speed/High Throttle Pedal Effort on Cold Start-up at Very Cold Ambient Temperatures (Re-direct P.C.V. Vapors at Air Filter)

CONDITION

It is possible under certain operating conditions (i.e. very cold ambient temperatures) that high idle speed at cold start will not return to normal idle speed during engine warm-up.

CAUSE

Certain driving patterns may cause high water condensation in the crankcase.

This water is drawn through the P.C.V. system, into the air filter, and directed into the throttle body. Under some conditions at very low ambient temperatures, the water can freeze in the throttle body area and restrict normal movement of the throttle.

CORRECTION

To correct this condition, the air filter housing must be modified to re-direct the incoming vapors from the P.C.V. system.

1. Remove air filter assembly from vehicle.
2. Install RC.V. outlet block-off plate, p/n 52367192, as shown in Fig 1 and secure with pop rivet, p/n 9441669 or equivalent.
3. Drill a 12 mm (1/2") diameter hole in the side of the P.C.V. housing, approximately 150' counterclockwise from existing hole in outlet as shown in Fig 2 . A smaller diameter pilot hole should be drilled first.
4. Remove all drill hole flashings from housing.
5. Inspect air filter housing thermac mechanism for correct operation.
6. Re-install air filter assembly.

BULLETIN ILLUSTRATION LIST

PARTS INFORMATION

Part #	Description	Quantity
52367192	Plate	1
9441669	Rivet	1

WARRANTY INFORMATION

Labour Operation; T8525, Labour Time; 0.2 hr