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Engine Control Module: Customer Interest
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.

Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins > Customer Interest for Engine Control Module: > F00794 > Jun > 94 > Exhaust - Sulfur Odor

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