Intermittent ignition 85 Mondial Q.V. | FerrariChat
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Intermittent ignition 85 Mondial Q.V.

Discussion in 'Mondial' started by Anthony bentley, Jul 1, 2018.

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  1. Anthony bentley

    Anthony bentley Formula Junior

    May 20, 2006
    560
    London
    Full Name:
    Anthony Bentley
    #1 Anthony bentley, Jul 1, 2018
    Sometimes I have no ignition, the engine cranks fine but will not fire due to no ignition, sometimes no light or it dies as I am cranking. Takes a few goes but generally it starts and I’m off. I have a had a few instances where the ignition has died while driving, but managed to start it back up on the move.
    1. Which white connector on the fuse board powers the ignition, with which wire?
    2. Is there a main earth/ground for the ignition (starter motor engages and turns fine)

    Thanks
    Anthony
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,866
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #2 Steve Magnusson, Jul 1, 2018
  3. Anthony bentley

    Anthony bentley Formula Junior

    May 20, 2006
    560
    London
    Full Name:
    Anthony Bentley
    #3 Anthony bentley, Jul 1, 2018
    But surely the fact I have no ignition light on dash would mean main feed.
     
  4. StuR

    StuR Formula Junior

    Jun 14, 2005
    561
    UK Buckinghamshire
    Full Name:
    Stu R
    #4 StuR, Jul 1, 2018
    AB,

    I had a series of hot start issues, solved with rebuilt alt, starter and fitted a gizmo not dissimilar to how you sort the windows!!

    I then ran ok until I suddenly had a couple of all power gone moments - blips really. With no common theme - weather, temp, speed, duration....

    I restored main grounds and reconditioned the engine wiring /chassis harness plug. The latter was pretty poor and loose (plug and chassis fixing)

    I also restored the battery cut off. I had a direct ignition feed to the starter from a starting button as a temporary fix to hot starting. I ended up keeping that anyway as I liked firing up off a button - I see the factory copied that from me for later models ;-)

    Ran a lot better and no more cut outs.





    Sent from my iPhone using Tapatalk
     
  5. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,866
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #5 Steve Magnusson, Jul 1, 2018
    Not following you here (by "light" I thought you meant "light off"). Are you saying that you sometimes turn the ignition key to Pos II (run) and the alternator warning light does not come "on"?
     
  6. Anthony bentley

    Anthony bentley Formula Junior

    May 20, 2006
    560
    London
    Full Name:
    Anthony Bentley
    #6 Anthony bentley, Jul 1, 2018
    Sorry, yes exactly that, no alternator warning light. Over here we also refer to it as an ignition light.
     
  7. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,866
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #7 Steve Magnusson, Jul 1, 2018
    Measuring the voltage on one of the two red wires in the single vertical w white connector (relative to ground) with the key "on" when the alternator warning light stays "off" will tell you if it's probably an ignition switch problem (red wire measures +12V) or probably an upstream main +12V problem (red wire measures 0V). See this thread for the same problem on another Mondial QV (here the trouble was an upstream main +12V problem):

    https://www.ferrarichat.com/forum/threads/help-needed-engine-stops-wont-crank.577523/#post-146027115
     
  8. Pero

    Pero Formula Junior

    Apr 22, 2011
    825
    Sweden
    Full Name:
    Peter R
    #8 Pero, Jul 2, 2018

    Still running Great!
    /Peter
     
    paulchua likes this.

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