3500 4x2 Pickup V8-360 5.9L Magnum (1994)
Oxygen Sensor: Customer Interest
Oxygen Sensor - Rough Idle/Lack of Power/Black Smoke
NO: 18-06-95
GROUP: Vehicle Performance
DATE: Feb. 3, 1995
SUBJECT:
Engine Runs Poorly, Lacks Power Idles Rough And/Or Blows Black Smoke
MODELS:
1994-1995 (BR) Ram Truck
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 5.9L H.D. OR 8.0L ENGINES BUILT PRIOR TO SEPTEMBER 1, 1994
(MDH 09-01-XX)
SYMPTOM/CONDITION:
Engine runs poorly, lacks power, idles rough and/or may blow black smoke at operating temperatures.
DIAGNOSIS:
Test drive vehicle, ensuring that vehicle is at full operating temperatures. Using the Mopar Diagnostic System (MDS) or the Scan Tool (DRBII 1994
MY or, DRBIII 1995 MY) with appropriate diagnostic procedure manual, check the 02 circuits for the sensor outputs. If any of the above symptoms are
present or DRB II/III (Scan Tool) diagnosis indicates left 02 sensor output stuck on rich rail and right on lean rail, proceed with the repair procedure.
REPAIR PROCEDURE:
This bulletin involves correction of the two 02 sensors at the wire harness connectors.
02 Sensor Harness
02 Sensor Harness
1.
With the vehicle on a hoist examine the left (Figure 1) and right (Figure 2) O2 sensor wires at the black connectors. Both sensor's wire harness
connections should have a BK/LB wire, DG/O wire and BK/W wire.
2.
The remaining wire in the right O2 sensor connector should be a black/dark green wire.
The remaining wire in the Left O2 sensor connector should be a tan/white wire.
3.
If the wires in step 2 are reversed, disconnect the two O2 sensor connectors and reconnect them in the opposite sensors. For routing refer to
