POOR DRIVEABILITY OR CHECK ENGINE LIGHT CODE 44 OR 45. Cadillac Cimarron 1982

For 1990-2009 cars

# POOR DRIVEABILITY OR CHECK ENGINE LIGHT CODE 44 OR 45

#### MODELS AFFECTED: ALL 1982 CIMARRONS

Some 1982 Cimarrons may experience any of the following conditions:

Lean Rich

Loss of part throttle power. Sulfurous, pungent, or rotten egg odor. Stumble or hesitation on part Stall at idle. throttle acceleration. Black smoke in some cases. Occasional backfire on acceleration. "CHECK ENGINE" light w/code 45 Surge. stored in ECM. "CHECK ENGINE" light w/Code 44 stored in ECM.

Any of these conditions may be the result of a malfunctioning mixture control so!enoid fuel valve tip. Some production solenoids P/N 17064521 (64521 visible on top) have rubber tips, while other solenoids P/N 17081807 (80807 visible on top) have staintess steel tips. Rubber tips can fragment causing the above lean or rich conditions.

If an owner experiences any of these symptoms, the mixture control (M/C) solenoid fuel valve tip should be checked for proper sealing using the following procedure. If it does not pass all the checks, replace it with P/N 17081807, which utilizes the stainless stee! fuel valve tip.

The mixture control solenoid service kit, P/N 17111445 includes mixture control solenoid P/N 17081807.

1. Remove M/C solenoid from carburetor.

2. Inspect the solenoid to float bowl seal. If cracked or damaged, remove retainer, seal, and spacer, and verify proper operation as follows:

Energize M/C solenoid using a 12 volt source, (solenoid will be in the lean position).

Connect a jumper between the RIGHT terminal of the solenoid connector and the positive (+) terminal of the 12 volt source.

Connect the LEFT terminal of the solenoid connector and the ground (-) terminal.

Use J-23738-A or BT-7517, hand operated vacuum pump, to apply approximately 5" Hg (16kPa) vacuum to the seal end of the solenoid. Do not exceed 5" Hg (16kPa) vacuum as the fuel valve tip could become stuck in the metering orifice.

If it does not hold vacuum for approximately five seconds, the fuel valve tip is not sealing properly, and the solenoid should be replaced.

3. Remove the jumper lead to the 12 volt source. The gage reading should go to zero. If it does not, the fuel valve tip is sticking or the fuel metering orifice is blocked, and the solenoid should be replaced.

4. Apply rapid vacuum pumping action. Gage should move only slightly, then return to zero before the next rapid stroke. If it does not, the fuel metering orifice is restricted, and the solenoid should be replaced.

5. Reposition or replace solenoid seal if necessary.

6. Install M/C solenoid in carburetor with a new gasket.

For warranty purposes use labor operation J-6362 for .4 hours.

This service is covered by the Emissionn Warranty Provisions of 5 years/50,000 miles.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.