Trooper LS V6-3.5L (1998)
Intake Manifold Gasket: Customer Interest
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 Common Chamber Assembly as described in the Workshop Manual for Common Chamber Assembly removal.
IMPORTANT:
Remove Common Chamber as one piece, separation of upper and lower chamber is not required.
