Cherokee 2WD L6-242 4.0L VIN L FI (1990)
Crankshaft Position Sensor: Customer Interest
Crankshaft Position Sensor - Engine Die-Out/Hard Restart
Models
1989 MJ & XJ Bodies
Subject
4.0L No-Start, Hard Restart, or Engine Die-Out. Vehicles Equipped With Automatic Transmission Only.
Index
DRIVEABILITY
Date
December 29, 1989
No.
18-57-89
(C18-23-9)
P-14
BODY CODE LEGEND
MJ - COMANCHE (RWD, 4WD) XJ - CHEROKEE/WAGONEER (RWD, 4WD)
SYMPTOM/CONDITION
Some 1989 vehicles equipped with the 4.0L engine and automatic transmission may experience an engine no-start, hard restart, or an engine die-out. This
condition may be caused by low signal strength from the crank position sensor due to a larger than desired distance to the flywheel sensing ring.
DIAGNOSIS
Check to see if the vehicle has a slotted crank position sensor:
1.
If the vehicle is equipped with a slotted crank position sensor (see Figure 1), check to see if the CPS grommet on the top of the transmission bell
housing has been updated (see Figure 2). If the CPS grommet has not been updated, replace the CPS grommet per the Repair Procedure outlined
below.
If the vehicle has a slotted crank position sensor and new CPS grommet, do not install a new sensor, but reinstall the slotted sensor that was on the
vehicle and verify that it is good using procedures in the 1989 Jeep Service Manual 81-370-9045 on page 14-87.
2.
If the vehicle does not have a slotted crank position sensor already installed, then proceed with the Repair Procedure.
PARTS REQUIRED
1
Crank Position Sensor (slotted)
PN 83100067
1
Crank Position Sensor Grommet (dust cover)
PN 83100068