Mondial T stopped running- suggest elec checks? | FerrariChat

Mondial T stopped running- suggest elec checks?

Discussion in 'Mondial' started by Fletchf1, Dec 27, 2021.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. Fletchf1

    Fletchf1 Rookie

    Jun 29, 2018
    8
    Banbury
    Full Name:
    Christian Fletcher
    #1 Fletchf1, Dec 27, 2021
    1990 t coupe. Was running fine. Suddenly went half power, ran for a mile or so, idled very lumpy for a minute, now no start.
    I have a workshop manual and wiring diagram. Can anyone suggest basic electrical checks I can run using a multi meter? To check the key sensors, relays, power to ECU, ignition coils and fuel pumps.
    I wish to avoid blindly swapping over expensive components for new. All I have tried so far has been new crank position sensors because aftermarket Kia parts were v cheap, no difference so put the originals back on.
     
  2. aec

    aec Karting

    Jul 28, 2011
    138
    Weston, MA
    #2 aec, Dec 27, 2021
    Did any of the "Slow Down" warming lights come on before it went to half power? Temperature sensors on catalytic converters (if you have them) can shut down engine banks when cats overheat.
     
  3. 83Mondialqv

    83Mondialqv Formula Junior

    May 18, 2021
    326
    New York
    Full Name:
    Vito L
    #3 83Mondialqv, Dec 27, 2021
    You should check the fuse box. Have you upgraded it yet? My mondi did that and it was the fuse box.


    Sent from my iPhone using FerrariChat.com mobile app
     
  4. Fletchf1

    Fletchf1 Rookie

    Jun 29, 2018
    8
    Banbury
    Full Name:
    Christian Fletcher
    #4 Fletchf1, Dec 27, 2021
    No dash warning lights, and no cat temp sensors are fitted. I have the original fuse box so will check all fuse and relay connections
     
  5. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    25,150
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #5 Steve Magnusson, Dec 27, 2021
    When you say "no dash warning lights" do you mean:

    1. I turn the key "on", and there are literally no lights "on", not even the alternator warning light,

    or

    2. I turn the key "on", and the alternator warning light comes "on", but there are no other oddball warning lights "on" (like "check engine")?
     
  6. moysiuan

    moysiuan F1 Rookie
    Silver Subscribed

    Nov 1, 2005
    3,645
    Canada
    #6 moysiuan, Dec 27, 2021
    1990 t Coupe is nice!

    Sounds like one bank of the engine went down, maybe a coil or related power module failure is my immediate reaction.

    https://www.superformance.co.uk/348/ignition.html

    The ones on there can probably be tested, maybe someone can detail the procedure for a coil/module test.
     
  7. Fletchf1

    Fletchf1 Rookie

    Jun 29, 2018
    8
    Banbury
    Full Name:
    Christian Fletcher
    #7 Fletchf1, Dec 28, 2021
    Answer to Steve; #2, there are no oddball warning lights on the dash, just ign and oil I think, the usual.
     
  8. Fletchf1

    Fletchf1 Rookie

    Jun 29, 2018
    8
    Banbury
    Full Name:
    Christian Fletcher
    #8 Fletchf1, Dec 28, 2021
    Answer to Moysiuan; does anyone know how to test the coils using a multimeter?
     
  9. Wingnut

    Wingnut Karting

    Feb 11, 2005
    126
    Corolla, NC
    #9 Wingnut, Dec 29, 2021
    A coil went bad on my 1990 t. Similar engine problems, one bank not firing. RockAuto had Bosch replacement coils for @$60 each as I recall. Check out my post on coils for the Mondial t here on FerrariC
    Wingnut
     
  10. Fletchf1

    Fletchf1 Rookie

    Jun 29, 2018
    8
    Banbury
    Full Name:
    Christian Fletcher
    #10 Fletchf1, Dec 29, 2021
    Thanks for all your helpful replies.
    I found the problem today.
    Left bank had no fuel supply so checked the pump relay on the rear bulkhead in the boot. The fuse had blown. All fine now.
     
    JLF, gsfent and moysiuan like this.
  11. theunissenguido

    theunissenguido Formula 3
    Owner Silver Subscribed

    Jan 21, 2004
    2,372
    Argent/Brasil
    Full Name:
    Guido
    #11 theunissenguido, Dec 30, 2021
    Time to find out why that fuse did blow...
     
  12. Meister

    Meister F1 Veteran
    Silver Subscribed

    Apr 27, 2001
    5,516
    Duluth, MN
    Full Name:
    The Meister
    #12 Meister, Dec 31, 2021

    was going to suggest this. Always start with the simple stuff. Verify fuel supply, spark then if those exist move on to more complicated stuff. Glad you found it.
     
  13. paulchua

    paulchua Cat Herder
    Lifetime Rossa Owner

    Jul 1, 2013
    16,096
    Menlo Park, CA
    Full Name:
    Paul Chua
    #13 paulchua, Jan 1, 2022
    Hmmm, could also be bad fuel pump too, that’s what happened to me when I ran half engine.
     

Share This Page