Intake Manifold Gasket - MIL ON/DTC's Set

BULLETIN NUMBER:
SB0O-01-S005

ISSUE DATE:
APRIL 2000

GROUP:
ENGINE

INTERMITTENT ROUGH IDLE AND/OR THE MIL IS ON WITH
DTC P0171, P0174, OR P1171

AFFECTED VEHICLES

All 1998-99 Rodeo (UE) & Trooper (UX) V-6 models with 6VD1W/6VE1W engines Some 2000 Rodeo (UE), Trooper (UX) & VehiCROSS (VX) V-6 models with 6VD1W/6VE1W engines, engine breakpoint: 845194

SERVICE INFORMATION

Condition:
Some customers may complain that the engine runs rough or MIL light on. In some cases, vacuum leak noise may be heard as well. [Intermittent rough idle and/or the MIL is on with DTC P0171 (Fuel Trim System Lean Bank 1), P0174 (Fuel Trim System Lean Bank 2), or P1171 (Fuel Trim System Lean During Acceleration)].

Probable Cause:
It was found that the inlet manifold gasket(s) were cracking due to excessive stress caused by heat expansion/contraction.

Correction:
Replace old inlet manifold gasket(s) with new inlet manifold gasket(s).

1. Perform diagnostic procedures as described in the appropriate Workshop Manual and correct any other faults found prior to proceeding to step 2.

2. Remove [1][2]Common Chamber Assembly as described in the Workshop Manual for Common Chamber Assembly removal.

IMPORTANT:
Remove [1][2]Common Chamber as one piece, separation of upper and lower chamber is not required.





3. Disconnect EGR valve pipe and EGR valve harness (figure 1).





NOTE:
By disconnecting EGR valve pipe from EGR valve, removal of EGR valve can be eliminated (figure 2).

4. Carefully remove both old inlet manifold gaskets and clean surfaces thoroughly (Make sure that all the old gasket material has been removed).

5. Install the new inlet manifold gaskets and replace [1][2]common chamber assembly.





PARTS INFORMATION

WARRANTY CLAIM INFORMATION





Use the Published labor operation, as shown.

Labor Time includes administrative time allowance.