Welcome Guest - Sign Up today
Welcome Guest - Sign Up today

Announcement

Collapse
No announcement yet.

Volvo Penta 3.0 GLM-C will not shut off

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Volvo Penta 3.0 GLM-C will not shut off

    Neither the kill switch nor the ignition switch will stop the engine. I have to pull the coil wire to get it to stop. The engine overheated just before this started happening. I've looked for a diode as I have read that this is a problem with the 4.3 engines but cannot find one. I suspect this is due to a mechanical fuel pump.

    The alternator seems to be working just fine. The voltage is over 14 when running with no load.

    Any ideas?

  • #2
    Just to clarify are you pulling a spark plug wire (high voltage wire) off the coil or are you pulling the 12vdc supply power terminal?

    In either case, I believe your problem is related to the 12vdc supply power and its failure to go to zero volts at the proper time. That the kill switch doesn't work suggests there's an alternate source of 12v supply, jumper wire(s) in the harness or a relay contact is welded closed, just to tick off some ideas.

    Comment


    • #3
      Yes, I had to pull the ignition wire as removing the positive battery terminal did not stop the engine.

      Comment


      • #4
        There are some small relays by the fuse panel. Guessing one of those stuck closed

        Comment


        • #5
          Sign up today
          Water in the fuel can cause this. Just in case it’s unrelated to what you suspect. But usually stumbles and stutters when it runs on with key off.

          Comment

          Working...
          X