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  • #1

    Crank but no start

    So my latest project was pulling the Lt1 from that 95 red Formula that is all rusted out and putting it in a 96 firebird. I got the motor swap done and I also swapped the engine bay harness. I got evething hooked up and it cranks but no start. I didnt get time to do much testing but i dont think im getting spark or fuel so im thinking I dont have power to the PCM. I was reading through posts and the only difference i see that would cause my problem is 96 body harness is the PCM power is on the body harness and the 95 PCM comes from the engine harness. So since I swaped the engine bay harness I should be ok there? any one else do this swap that can shed some light on the situation for me? I am going to be towing the car my house tomorrow so I can do some more testing but thought I would start asking to see if some one can make the diag a little quicker and easier for me.

    Thanks in advance
    1998 Pontiac Trans Am LS1, Ram Air, White with custom Ghost Flames, Black Leather Interior, T-Tops, T56 Trans, 4.10 Rear End, Spohn Adjustable Torque Arm, Line Lock, Kooks Headers, Kooks ORY Pipe, SLP Loudmouth II catback, LS6 Intake, K&N Air filter, Centerforce Dual friction Clutch, Lowered and "Conklinized"

    Pioneer D3 HU, Infinity Reference 6.5 componets. Kenwood KAC-9104 1800w AMP, Kenwood KAC-8404 600w AMP, Subthump Stealth enclosure, PPI PRO104 2000 watt DVC Sub

    sigpic
    Tags: body, car, difference, engine, firebird, formula, fuel, harness, house, king, light, lt1, motor, pcm, posts, power, problem, project, red, spark, swap, thinking, thought, time, towing
  • #2
    What engine did you have originally? If a V6 the dash harness may be different for a V6.

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    • #3
      Originally posted by 2002Z4CSS View Post
      What engine did you have originally? If a V6 the dash harness may be different for a V6.
      yeah its a v6 i know it was a little different I was hoping some one had some insight on the diffenrences, I spoke with jderry he just did this same swap about a year ago and hopefully I got what i needed. Thanks
      1998 Pontiac Trans Am LS1, Ram Air, White with custom Ghost Flames, Black Leather Interior, T-Tops, T56 Trans, 4.10 Rear End, Spohn Adjustable Torque Arm, Line Lock, Kooks Headers, Kooks ORY Pipe, SLP Loudmouth II catback, LS6 Intake, K&N Air filter, Centerforce Dual friction Clutch, Lowered and "Conklinized"

      Pioneer D3 HU, Infinity Reference 6.5 componets. Kenwood KAC-9104 1800w AMP, Kenwood KAC-8404 600w AMP, Subthump Stealth enclosure, PPI PRO104 2000 watt DVC Sub

      sigpic

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      • #4
        There were several wires that needed to be fixed. There was a power wire to PCM or injecters in plugs on passenger side fender well, I believe to OBD port wire is different and you'll have to swap gauge assembly. I'll check my notes and see if I have these from when we swapped v6 to v8 in brians car. We went from 94 v6 to 95 LT1.
        sigpic
        1998 Trans Am Convertible A4 - WS6 hood, WS6 air lid, WS6 rims, drilled/slotted rotors.

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        • #5
          What you'll need to do is go to shbox.com's Wire Harness page and then look at the differences between 1995 and 1996. Biggest problem is that 1995 is an OBD1.5 and 1996 is OBD2.
          - Brian Meissen
          Owner, MiFBody.com
          Administrator, LTxTech.com


          1994 Camaro LT1 Transplant - 357ci LT1, cammed, stalled, and driven.
          2022 Camaro LT1 - "Cherry Bomb 2"
          Michigan FBody Meet & Greet Car Show 2022
          June 4th, 2022 - 9am to 3pm!!!
          The HUB Stadium, Auburn Hills, MI

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          • #6
            Originally posted by meissen View Post
            What you'll need to do is go to shbox.com's Wire Harness page and then look at the differences between 1995 and 1996. Biggest problem is that 1995 is an OBD1.5 and 1996 is OBD2.
            I looked there but all I could find is 95 diagrams ill look again
            1998 Pontiac Trans Am LS1, Ram Air, White with custom Ghost Flames, Black Leather Interior, T-Tops, T56 Trans, 4.10 Rear End, Spohn Adjustable Torque Arm, Line Lock, Kooks Headers, Kooks ORY Pipe, SLP Loudmouth II catback, LS6 Intake, K&N Air filter, Centerforce Dual friction Clutch, Lowered and "Conklinized"

            Pioneer D3 HU, Infinity Reference 6.5 componets. Kenwood KAC-9104 1800w AMP, Kenwood KAC-8404 600w AMP, Subthump Stealth enclosure, PPI PRO104 2000 watt DVC Sub

            sigpic

            Comment

            • #7
              Originally posted by meissen View Post
              What you'll need to do is go to shbox.com's Wire Harness page and then look at the differences between 1995 and 1996. Biggest problem is that 1995 is an OBD1.5 and 1996 is OBD2.
              hes right
              sigpic
              94 Z28 - speed limit removed and shift points changed (previous owner did that,) tb bypass mod, cai, msd otvc wires,opti, and coil, pacesetter longtubes+3in ory all the way back to a flowmaster 40 (i know), a/c delete, z06 wheels 17x9.5+18x11.5 , ss spoiler w/leds, tints 20% in front 5% in back, halo projector and custom hid setup 10000k, purty motor paint, led fan switches (1 for each) custom interior (suede) and some carbon fiber and white leds, ttops, and 1600 watts in the trunk.

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