Fuel System - Phantom Stalls at Closed Throttle/Loads

File In Section: 6E - Engine Fuel & Emission

Bulletin No.: 67-63-03

Date: June, 1996

Subject:
Phantom Stalls at Closed Throttle and High Engine Loads
(Replace Fuel Injectors)

Models:
1991-93 Chevrolet Lumina
1991-93 Oldsmobile Cutlass Supreme
1991-93 Pontiac Grand Prix
with 3.4L Twin DOHC V6 Engine (VIN X - RPO LQ1)

Condition

Some owners may experience a phantom stall when the engine throttle is closed and high load demands are placed on the engine. Typically this is encountered when the owner is maneuvering in a parking lot at an idle speed with a closed throttle and placing a high load demand on the engine such as power steering. The engine could stall but would restart immediately. This type of stall is very difficult to duplicate.

Correction

A new fuel injector, part number 25170699, has been released for service to correct this condition. The new fuel injector is designed to flow richer at a low pulse width. Before replacing the injectors, remember to check the following:

1. Minimum air rate setting.

2. Vehicles equipped with manual transmissions: check crankshaft end play, refer to bulletin 236007.

3. Power steering pressure switch.

4. Make sure the latest calibration is installed in the vehicle, refer to bulletin 336506.

Parts Information

Parts are currently available from GMSPO.

Qty Part Number Name

6 25170699 Injector Asm - M/Port fuel

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation Labor Time

J5650 Injector, fuel - Use published labor
replace operation time.