MIL On, Poor Driveability, and DTC's 44 or 45 Set
Bulletin No. T 86-51File in Group 6E
Number 27
Corp. Ref. No. 802 5825
Date April '86
SUBJECT: POOR DRIVEABILITY OR CHECK ENGINE LIGHT CODE 44 (LEAN) OR CODE 45 (RICH)
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 solenoid 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 stainless 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 steel fuel valve tip.
The mixture control solenoid service kit, P/N 17111445 includes mixture control solenoid P/N 17081807.
FIGURE 1 - M/C SOLENOID TESTS:
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 (16 kPa) vacuum to the seal end of the solenoid. Do not exceed 5" Hg (16 kPa) 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 Emission Warranty Provisions of 5 years/50,000 miles.