Engine shut off while driving and will not start

1994 JEEP CHEROKEE

260,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC

DAVID WOOD2

MEMBER
1 POST
FOLLOW

I was driving and the motor started cutting out then shut off.
No spark.
I hooked a meter to the coil power plug.
When I turn the key to run position the fuel pump runs, both fuel pump relay and ads relay buzz. there's power to the coil for few seconds then everything quits. I shut the key off and wait 30 seconds and it will do the same thing again.

Mar 31, 2021 at 9:00 AM

ASEMASTER6371

CERTIFIED EXPERT
52,796 POSTS

Good morning,

A common failure is the crank sensor for this issue.

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

I attached the wiring diagram and the location for you below. Check the sensor for the 8-volt reference voltage. You will need a voltmeter for this test.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Roy

REMOVAL
1. Disconnect negative battery cable.
2. Disconnect sensor electrical connector, located near rear of intake manifold.
3. Remove nut holding sensor wiring clip to fuel rail.
4. Remove sensor mounting bolt(s) or nuts.
5. Remove the sensor from vehicle.
6. Remove clip from sensor wiring harness.

INSTALLATION
1. Be sure the paper spacer is installed on bottom of new sensor.

NOTE: If original sensor is being reinstalled, clean bottom of sensor before installation. Obtain a new paper spacer and install on sensor. If spacer is not installed, sensor will be damaged when engine is started.

2. Position camshaft position sensor in transmission housing and install mounting bolt finger tight.
3. Gently push down on sensor until paper spacer contacts the outer edge of flywheel.
4. Torque sensor mounting bolt to 6-to-8 Nm (50-to-70 in. lbs.).
5. Connect the electrical connector to the sensor.
6. Install clip on sensor wire.
7. Install clip over fuel rail stud and tighten mounting nut.

Images (Click to enlarge)

Mar 31, 2021 at 9:31 AM