Help needed. Engine stops, won't crank. | FerrariChat

Help needed. Engine stops, won't crank.

Discussion in 'Mondial' started by Pero, Jun 5, 2018.

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  1. Pero

    Pero Formula Junior
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    Apr 22, 2011
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    Everything ready for the season, I thought. Last week first drive, starts directly, engine runs great, no misfire.

    Today... starts directly, drove out of the garage, engine suddenly dies. Try to start, no crank. Batteri ok, lights and everything works. No crank, can't hear any click or anything, nothing. If it was the solenoid it would not crank, but that would not make it stall when running (?).

    Please point me in a direction.
    /Peter
     
  2. stekkefun4

    stekkefun4 Formula 3
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    I would check the following things:

    - Fuel pump: check if it works, makes a buzzing noise when stering
    - Fusebox: check the fuse for the fuel pump and starter and look if it wasn't burnt (the white connector at the far right, 3d metal pin from the bottom if I remember well
    - Ground connection of the battery: by-pass the standard battery switch and run a cable from the "-" at the battery to the chassis
     
  3. Pero

    Pero Formula Junior
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    Thank you Stefan, will try that. Still puzzled of what happened, inbetween electrical and fuel. Will make some work tomorrow.
    /Peter
     
  4. moysiuan

    moysiuan F1 Rookie
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    A failed alternator can cause a car to stall, and after the first start the battery may be discharged such that it can not crank the car but have enough residual charge that the lights would work. Or, a failed battery can load the alternator and cause the car to stall. I am thinking its a battery or battery cable connection issue.

    Possible blown fuses, or fuse box "burnt" connectors would be the next possible culprit.
     
  5. Pero

    Pero Formula Junior
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    Thank you Andy. Will check that too.
    /Peter
     
  6. stekkefun4

    stekkefun4 Formula 3
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    Damn autocorrect :)
     
  7. Pero

    Pero Formula Junior
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    So far, no burnt fuses, nothing burnt at white connector. Ground connection at batteri already removed before. Charged the battery, tried to crank, nothing. Lights etc. works. No idea how much amps the battery can produce though. Going in to starter to check connections tomorrow.
    /Peter
     
  8. Pero

    Pero Formula Junior
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    Since I will be at the starter tomorrow I might as well add the starter relay solution while being in there. Wiring seems simple, but were do you put the relay?
    /Peter
     
  9. stekkefun4

    stekkefun4 Formula 3
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    You put the relay on top of the chassis bar just next to the Magneti Marelli modules
     
  10. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    When you turn the key to "on", does the alternator warning light also go "on"?
     
  11. Pero

    Pero Formula Junior
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    Great! Good place.
    /Peter
     
  12. Pero

    Pero Formula Junior
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    Hmmmm... Don't think so. Will check. What would that indicate, on or not?
    /Peter
     
  13. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #13 Steve Magnusson, Jun 6, 2018
    Last edited: Jun 6, 2018
    If the alt warning light does not illuminate with key "on", it would indicate that there is probably a problem in the ignition switch itself or the +12V wiring coming into it (or out of it) -- and this would match your symptom of the engine stopping; whereas, having a problem in the starter, or its wiring, giving a no start condition would not stop the engine once it is running.

    What version 1985 Mondial QV do you have (and please indicate whether it is 3.0L or a 3.2L just to be sure -- your location makes "model year" less definitive)?
     
  14. Pero

    Pero Formula Junior
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    Ok, good point. Will check.
    /Peter
     
  15. Pero

    Pero Formula Junior
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    It is a 3.0 -85 Euro Mondial QV Cabriolet.
    /Peter
     
  16. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #16 Steve Magnusson, Jun 6, 2018
    Last edited: Jun 6, 2018
    Checked your wiring diagram (here's a link if you don't have a copy):

    https://www.dropbox.com/s/shgl3mh5nmmfqcw/Wiring Diagram Mondial QV Euro Version.pdf?dl=0

    and (if your alt warning light isn't illuminating) the first diagnostic thing that I would do is measure the voltage from either of the terminals holding the large red wires leaving the middle of the vertical w connector on your fuse-relay panel to chassis ground (it should always be +12V even with no key present, but make this measurement with the key "on" to put this circuit under load so upstream unwanted high resistances can be detected). You should be able to touch the back of the metal terminal in the w connector with your voltmeter probe even when the w connector is plugged in. (Of course, also unplug/inspect/reseat the w connector too.)
     
  17. Pero

    Pero Formula Junior
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    Thank you Steve. I have a printed version wiring diagram but now also on file, good to have. Will follow your instruction first thing tomorrow.
    /Peter
     
  18. Pero

    Pero Formula Junior
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    So,
    No alternator light when key is on.
    Ignition key off, 12 V on the red terminal.
    Ignition key on, 0 V on the red terminal.
    No blown fuses.
    Lost indicators, but not hazard indicators.
    Lights, everything seems to work.
    Lost here.
    /Peter
     
  19. Pero

    Pero Formula Junior
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    Everything that goes through the ignition switch seems to be out. So is the ignition switch the place to go? Loose wire, bad connection...
    /Peter
     
  20. stekkefun4

    stekkefun4 Formula 3
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    Now the ignition switch is a real pain in the neck, I had to replace mine in the past, was beyond repair and I have some customers who had to do the same. The issue is located in the block in which the key fits , which cannot be opened. I can't remember having seen someone fixing it without having to replace it, I did a quick search on this forum but couldn't find a successful repair of the block itself.
     
  21. Pero

    Pero Formula Junior
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    Could it be in the SWF contact. Travelling so I might get the name wrong.
    Peter
     
  22. stekkefun4

    stekkefun4 Formula 3
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    The anti-theft device you mean?
     
  23. Pero

    Pero Formula Junior
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    Ok, I am totally wrong here, will check when I get home. You don't have anything useful on the shelf for me?
    /Peter
     
  24. stekkefun4

    stekkefun4 Formula 3
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    Many useful things including a number of anti-theft devices (= ignition switches). Anyhow, best to identify what's causing the issue first :)
     
  25. Pero

    Pero Formula Junior
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    Absolutely. Just checking if IF should happen. Good to know anyway.
    /Peter
     

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