Exhaust - Sulfur Odor

Bulletin No.: 007/94
Issued: 6/21/94
Revised:

Category
F

Applicable Models
1991-92 Navajo

Subject
4.0 LITER SULFUR ODOR

APPLICABLE MODELS/VINS
1991-92 Navajo vehicles with a 4.0 liter engine and automatic transmissions

DESCRIPTION
Exhaust sulfur odor may be present during various driving conditions. This may be caused by the operating parameters of the EEC processor or catalytic converter. Follow the instructions in this bulletin to determine which part is the cause of the odor.

REPAIR PROCEDURE
1. Perform the diagnostic procedures described in Powertrain Management/Computers and Control Systems.





2. Verify the part number of the EEC processor. If the processor has not been updated, install a new processor. Refer to the table for applicable processors. If the processor has been updated, replace the catalytic converter.
NOTE:
The BAP sensor is not required with the new powertrain control module but may remain connected without interference.

3. FOR 1991 MODEL VEHICLES: Future diagnosis of the vehicle's fuel and emission system will require the instructions in the Powertrain Management/Computers and Control Systems. This information must be noted in the vehicle and remain a permanent record for the owner. This should be indicated in pen on the new EEC processor and noted in the owner's manual.
4. Verify repair.

WARRANTY INFORMATION
(Applies To Vehicles Covered Under Normal Warranty)
Warranty Type: A
Customer Comment Code: 84
Damage Code: 9H

Replacement Of EEC Processor
Part Number Main Cause: ZZLF 18 881 or ZZLG 18 881
Quantity: 1
Operation Number/Labor Hours: F0003XDX / 0.5Hrs. (EEC Diagnostics)
F0812XRX / 0.6Hrs. (Replace EEC Processor)

Replacement Of Catalytic Converter (Claim Only If EEC Processor Was Previously Replaced)
Part Number Main Cause: ZZLO 20 600
Quantity: 1
Operation Number/Labor Hours: F0003XDX / 0.5Hrs. (EEC Diagnostics)
F0702XRX / 0.8Hrs.(Replace Catalytic Converter)