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    Results 1 to 7 of 7
    1. #1
      Join Date
      Aug 2006
      Location
      fort myers florida
      Posts
      200

      Coil on plug wire harness

      Can you guy's point me to someone who can make a wire harness for LS1 coil's to a Holley HP ecm.
      Holley has it listed in there catalog but it is not being produced yet.
      This is going on a big block chevy with coil on plug Ls1 coils.



    2. #2
      Join Date
      Jun 2005
      Location
      Lynnwood Wa.
      Posts
      248
      Country Flag: United States
      The local Pick a Part is your fried.
      Which coils are you running?. The LS1 or the "Truck" coils?
      Each type coil takes a different size plug at the coil. and the bracket that mounts the coil to the
      valve cover.
      Oliver Shultz
      It's OK to giggle and snicker. don't laugh and point

    3. #3
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      16,118
      Country Flag: United States
      Why can't you just buy the factory LS coil harnesses? They are small harnesses that have 4 connectors for the coils and a big connector at the center of the valve cover which mates to the rest of the engine harness.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @dr__efi
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    4. #4
      Join Date
      Jun 2005
      Location
      Lynnwood Wa.
      Posts
      248
      Country Flag: United States
      Pick a Part is cheaper.
      Get the complete coils, mounting bracket and the harness if possible get the "Truck " coils.
      They are a better coil.
      Can also cut enough wire past the big gray plug to help with splicing into the Holley ECM.
      Truck coil is the far right.
      Attached Images Attached Images  
      Oliver Shultz
      It's OK to giggle and snicker. don't laugh and point

    5. #5
      Join Date
      Aug 2006
      Location
      fort myers florida
      Posts
      200
      Thank's guy's. I guess i did not explain myself very good.
      What i have is 2003 truck coil's and the harness from the coil to the gray plug. What i need is the other half of the gray plug and about 5ft. of wire and the correct pin's into the Holley ecm.

    6. #6
      Join Date
      Jun 2005
      Location
      Lynnwood Wa.
      Posts
      248
      Country Flag: United States
      Good you have the Truck coils.
      Here again Pick a Part is your friend. The wire harness from the big gray plug is the same for a car or a truck
      get the harness from the plug to the stock ECM harness.
      Oliver Shultz
      It's OK to giggle and snicker. don't laugh and point

    7. #7
      Join Date
      Mar 2008
      Posts
      952
      couldn't you just snip off the gray plug and hardwire it, using a relay on the + side to give the coils full battery power?




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