No start, no spark

1999 JEEP CHEROKEE
200,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
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JIMMER1907
  • MEMBER
  • 1 POST
Change the coil the vehicle rolls over but doesn't start,was driving and had a bunch of things go crazy and then it shut off. Twenty minutes later wiggled some wires on again, hour later nothing. hasn't started since.
Jan 22, 2019 at 3:16 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good evening,

A very common issue for this is the crank sensor. It is mounted on the bell housing of the transmission. You need to access it from under the car.

REMOVAL
Some model/engine combinations may require removal of air cleaner tubes for access to sensor.
1. Remove air cleaner tube(s) at throttle body (if necessary).
2. Near rear of intake manifold, disconnect pigtail harness (electrical connector) from main electrical harness.
3. Depending upon application, remove either sensor mounting bolts or nuts.
4. Remove sensor.

INSTALLATION
1. Install sensor flush against opening in transmission housing.
2. Install and tighten two sensor mounting bolts to 19 Nm (14 ft. lbs.) torque. The two sensor mounting bolts are specially machined to correctly space unit to flywheel. Do not attempt to install any other bolts.
3. Connect sensor pigtail harness electrical connector to main wiring harness.
4. Install air cleaner tube to throttle body (if necessary).

Roy
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Jan 22, 2019 at 3:46 PM
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