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  • WTB engine harness

    Looking for a fwd 2.8 or 3.1 engine harness for my 3.4/3500 hybrid. Gonna be running a 7727 ecm. Thanks!

  • #2
    3.1 has a '7730 ECM (MAP), the 2.8 ECM you listed is MAF, just be aware that there are 2 different harnesses.

    I would suggest using a '7730 and there are plenty of harnesses for V8's on ebay for them.
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    • #3
      too bad you dont need an OBD2 L-body engine harness, i got one from when i was gonna do the swap on the Z26.
      sigpic
      99 Grand Am GT
      3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
      Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
      1357 cam 227 233 .050 dur
      515 515 lift 112 lsa
      15.232@88.85mph on stock 3400---New time to come


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      • #4
        Originally posted by ForcedFirebird View Post
        3.1 has a '7730 ECM (MAP), the 2.8 ECM you listed is MAF, just be aware that there are 2 different harnesses.

        I would suggest using a '7730 and there are plenty of harnesses for V8's on ebay for them.
        I thought the 7727 was simply the weatherproof version of the 7730?

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        • #5
          the 7727 uses 4 plugs compared to the 7730 using 3. they can be used in place of each other. uses the same tunes, just different connections
          1995 Monte Carlo LS 3100, 4T60E...for now, future plans include driving it until the wheels fall off!
          Latest nAst1 files here!
          Need a wiring diagram for any GM car or truck from 82-06(and 07-08 cars)? PM me!

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