1. Welcome to Jeeps.net!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Jeep discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Jeep owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Wiring for Howell EFI conversion?

Discussion in 'Jeep CJ' started by Stephanv01, Apr 22, 2017.

  1. Apr 22, 2017 at 12:39 PM
    #1
    Stephanv01

    Stephanv01 [OP] New Member

    Joined:
    Apr 22, 2017
    Member:
    #1379
    Messages:
    3
    Gender:
    Male
    First Name:
    Stephan
    Vehicle:
    1979 jeep cj5
    EFI
    I'm wondering if anyone has installed this system before? If so, where did you run the hot wire from the fuse box/engine light? It can't have power when the engine is off. Thanks for any feedback
     
  2. Apr 22, 2017 at 5:56 PM
    #2
    OFFGRID

    OFFGRID Well-Known Member

    Joined:
    Oct 3, 2016
    Member:
    #317
    Messages:
    2,018
    Gender:
    Male
    First Name:
    Peter
    Houston
    Vehicle:
    1979 Jeep CJ7, 258, TH350, NP208
    Howell fuel injection, header, HEI distributor, TH350, NP208, SOA lift with YJ springs in the front & GW springs in the Rear. AMC20 with G2 1 piece chromos trussed, Dana 30 with G2 chromos and 760x ujoints and MM Stainless Hubs, Geared 4.56. Tom Woods shafts, Metal cloaks, Caged, 37" Toyo MTs.
    Are you installing it on the 79 CJ-5? Any switched hot should work.
     
  3. Apr 22, 2017 at 6:11 PM
    #3
    Stephanv01

    Stephanv01 [OP] New Member

    Joined:
    Apr 22, 2017
    Member:
    #1379
    Messages:
    3
    Gender:
    Male
    First Name:
    Stephan
    Vehicle:
    1979 jeep cj5
    EFI
    Yes a 79 cj5. Okay, I wasn't sure if it should be a certain one. How about the coolant sensor: can I splice in the old temperature sensor? Ok hade to take it out to put in the CTO. Thanks
     
  4. Apr 23, 2017 at 10:22 AM
    #4
    OFFGRID

    OFFGRID Well-Known Member

    Joined:
    Oct 3, 2016
    Member:
    #317
    Messages:
    2,018
    Gender:
    Male
    First Name:
    Peter
    Houston
    Vehicle:
    1979 Jeep CJ7, 258, TH350, NP208
    Howell fuel injection, header, HEI distributor, TH350, NP208, SOA lift with YJ springs in the front & GW springs in the Rear. AMC20 with G2 1 piece chromos trussed, Dana 30 with G2 chromos and 760x ujoints and MM Stainless Hubs, Geared 4.56. Tom Woods shafts, Metal cloaks, Caged, 37" Toyo MTs.
    Are you running the 258 or the 304? I cant remember, but Doesn't Howell come with its own Temp sending unit? I believe that I left my old one in place for my gauge, and inserted the new one for the computer. I can't remember, but I think I put the new one driver side of block under the exhaust manifold to the rear of the block.
     
    Bob likes this.
  5. Apr 24, 2017 at 12:53 PM
    #5
    Stephanv01

    Stephanv01 [OP] New Member

    Joined:
    Apr 22, 2017
    Member:
    #1379
    Messages:
    3
    Gender:
    Male
    First Name:
    Stephan
    Vehicle:
    1979 jeep cj5
    EFI
    258, there were two ports on the block. One for the CTO valve and the other one for the computer. As of right now my stock one is disconnected. I really would like to figure out how to hook the original up so I can keep an eve on my temperature. Thank you for your info.
     
  6. Apr 24, 2017 at 5:45 PM
    #6
    OFFGRID

    OFFGRID Well-Known Member

    Joined:
    Oct 3, 2016
    Member:
    #317
    Messages:
    2,018
    Gender:
    Male
    First Name:
    Peter
    Houston
    Vehicle:
    1979 Jeep CJ7, 258, TH350, NP208
    Howell fuel injection, header, HEI distributor, TH350, NP208, SOA lift with YJ springs in the front & GW springs in the Rear. AMC20 with G2 1 piece chromos trussed, Dana 30 with G2 chromos and 760x ujoints and MM Stainless Hubs, Geared 4.56. Tom Woods shafts, Metal cloaks, Caged, 37" Toyo MTs.
    I did not use the CTO valve. I ran one vacuum off the tbi plate to the distributor and one to the pcv which T'd off with the brake booster. I removed all the egr and canister stuff. Plugged the space on the bottom of the intake and installed a header. I don't think you can do this legally in Cali. Don't know where you live.

    That port sensor off the block that goes to the computer, isn't that for the computer temp sensor. Your original one goes to your temp gauge inside.
     
To Top