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welding on a TR

Discussion in 'Boxers/TR/M' started by jkg2101, Mar 1, 2025.

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  1. jkg2101

    jkg2101 Karting

    Jan 25, 2015
    172
    New York
    #1 jkg2101, Mar 1, 2025
    As I prepare to begin my ill-advised project to build my own exhaust system on my new-to-me 87 TR (details forthcoming in another thread, success or not), I dont want to do any harm. I will have to MIG weld the parts on the car, at least tack weld them. i really dont want to damage any electrical parts, especially the fuel injection and ignition modules. On other cars, the party line seems to be to disconnect the battery, and then you dont have to worry about the on board computers.

    Should I unplug all the modules from their harnesses while welding? Or is it safe to tack weld with battery disconnected?

    justin
     
  2. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,538
    socal
    #2 fatbillybob, Mar 1, 2025
    I have always disconnected ecus from harness on all cars. It's a simple thing to do to prevent potential damage real or imagined. I have done a lot of welding on cars.
     
    turbo-joe likes this.
  3. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    36,745
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #3 Rifledriver, Mar 2, 2025
    Its really easy to do and takes literally about 1 minute. No down side so might as well take the pecaution.

    I have seen some really nice, custom made one off systems in TRs. If you are a good welder/fabricator show us when done.
     
    ago car nut likes this.

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