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Troubleshooting. 512TR back firing and stumbles on start up

Discussion in 'Boxers/TR/M' started by silvergts1998, Jun 26, 2020.

  1. silvergts1998

    silvergts1998 Formula 3

    Apr 10, 2005
    2,397
    ky
    Full Name:
    Adam
    I have a 1992 512TR and started it up to take it for a spin. The car was stumbling on start up and could smell fuel. It looks like maybe only one bank of the engine is firing and other side maybe not or just a few cylinders. The exhaust on the driver side is warm/hot and the passenger side is colder. I haven't pull the spark plugs out to see what they look like. Any idea what I should look for or where to start? I have the Dave Helms fuse board so not sure if there is something connected with that. I doubt it.
     
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  3. Qavion

    Qavion F1 Rookie

    Feb 20, 2015
    4,034
    Sydney
    Full Name:
    Ian Riddell
  4. Clyde Romero

    Clyde Romero Formula Junior

    Sep 6, 2019
    469
    Atlanta Georgia
    Full Name:
    Clarence Romero
    check your plug wires and the wires to the ignition module
     
    sherrillt likes this.
  5. kartboy1234

    kartboy1234 Formula Junior

    Nov 10, 2014
    447
    Palos Verdes, CA
    Full Name:
    Michael L
    Do the 512s have the protection relay for the ECU on the right side of the engine compartment. The fuse on mine kept blowing and causing the engine to run poorly.

    Sent from my GM1917 using Tapatalk
     
  6. Clyde Romero

    Clyde Romero Formula Junior

    Sep 6, 2019
    469
    Atlanta Georgia
    Full Name:
    Clarence Romero
    I don’t recall relay for the ECU’s
    You must have a short somewhere in the harness that’s blowing the fuse
    Remember it goes through the fire wall and that’s where I would be looking
    Hope this helps
     
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  8. kartboy1234

    kartboy1234 Formula Junior

    Nov 10, 2014
    447
    Palos Verdes, CA
    Full Name:
    Michael L
    My car is running great now, but I had issues when the fuse blew on the overvoltage protection relay, right side of the engine compartment, under the fender in a metal box.

    Sent from my GM1917 using Tapatalk
     
    EZORED likes this.
  9. Clyde Romero

    Clyde Romero Formula Junior

    Sep 6, 2019
    469
    Atlanta Georgia
    Full Name:
    Clarence Romero
    Good to here that
     

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