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Thread: Converting a 258-six CJ-7 to fuel injection

  1. #1
    Join Date
    Aug 2002
    Monterey, CA, USA and Quito, Ecuador, South America

    Default Converting a 258-six CJ-7 to fuel injection


    A friend of mine is trying to convert his 258 inline-six powered 1982 CJ-7 to fuel injection using the wiring and computer from a 1994 YJ Wrangler. He is also converting to a 4.0 Head. He has two questions that hopefully someone here can answer:

    1) Where should the engine pick up the Crankshaft Position Sensor's Signal: In the vibration damper or in the flywheel? The vibration damper can be bought in 4WD Hardware for the Mopar MPI kit, but will that signal work with the 1994 YJ Computer??

    2) Does the flyweel of a Jeep YJ 4.0 fit the CJ-7's 258-six?

    Thanks a lot for any help.
    - Pablo

    2013 JK Sport 6-Speed Manual
    2005 WK Limited 5.7 Hemi (wife's)
    1981 CJ-7 Laredo 360 V8

    2011 JK Sahara Auto 3.8 V6 (sold)
    2003 TJ Rubicon (sold)
    2002 KJ Sport 3.7 V6 (sold)
    2000 WJ Laredo QuadraDrive 4.7V8 (sold)
    1998 TJ Sahara (sold)
    1996 XJ Sport 4.0L (sold)
    1978 CJ-7 Renegade 304 V8 (sold)
    1992 YJ Base 4.0L (sold)
    1979 CJ-7 258 inline-six (sold)

  2. #2


    Try THIS sight. They have a lot of information on doing this swap.
    '79 CJ5 with not much '79 left to it

    SOA on Wagoneer Dana 44s locked
    T18/D18 with OD drive train
    258 with HO 4L head and OBD1 Fuel Injection
    Still fixing and building after almost 20 years

  3. #3


    You can buy a kit to relocate the cps to the damper. Otherwise you may have to modify the bell housing to make it work. Try hesco for the kit

  4. #4
    Registered shays4me's Avatar
    Join Date
    Jan 2005
    Eastern Oregun, not to be confused with Portland


    Novak sells a kit to mount it on the stock CJ bell housing as well.

    84CJ7 SBC, T19, D300, D30/AMC20HD, 4" lift.


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