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Jeep 4.0L CPS

20 March 2007

Crankshaft Position Sensor

The Crankshaft Position Sensor sends a signal to the computer in indicating the position of the crank. The ignition won’t spark if this isn’t working properly. From the factory, all ‘87 and up 4.0L engines have the CPS located at the top of the bellhousing, and read the signal off of the flywheel or flexplate. *The 87-90, 91-96, and 97+ HO flywheels/flexplates as well as CPS are NOT interchangeable!!!

91-96 (Mopar) CPS
The following information mainly applies to the 1991-1996 HO system.

Here are the options for using a CPS when swapping a 91-96 engine into a different vehicle:

  1. Retain the automatic transmission or manual transmission bellhousing from a 91-96 4.0L application which is already fitted for a CPS. This is the easiest if you have the transmission or bellhousing anyway.
  2. Buy a automatic transmission & flexplate or bellhousing & flywheel from a ‘91-96. Be sure that you get one that is from 91-96.
  3. Have a shop machine your bellhousing to fit a CPS. This is a service that Novak Adapters can perform. Purchase a ‘91-96 flexplate or flywheel.
  4. Use a CPS relocation kit
    1. Advance Adapters 716012-C (includes ‘91-96 sensor)
    2. Advance Adapters 716012 (includes ‘97-05 sensor)
    3. Hesco HES9199ED application: ‘91-03, no sensor included, use stock sensor.

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