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Mondial t engine- left bank running rich

Discussion in 'Mondial' started by Wingnut, Dec 2, 2019.

  1. Wingnut

    Wingnut Karting

    Feb 11, 2005
    71
    Corolla, NC
    Hey All,
    Just wanted to pass this on. The left bank of my 1990 Mondial t (5-8) began running so rich that combustion completely stopped. Hardly wanted to run at all. Fuel odor coming out of the exhaust.
    All 5-8 plugs wet, gas smell when pulled and sniffed. Carbon black coated. Cat Conv. not happy on the left side either.
    Right side (1-4) plugs looked as they should, clean, no carbon. I was going to first switch ignition coils when I found new Bosch ignition coils at RockAuto for.....$42.79, their part # 0221503407. With tax and shipping, total came to $53.14. I ordered one, just got it, put it in, and now the engine runs like a champ!. Ran down the road about 10 miles, pulled a #5 plug and saw immediate improvement in the look of the plug, like the carbon was cleaning off after that short run. My engine now runs so much better!
    Just ordered another for the right side.
    At this price, I would recommend to all Mondial t and 348 owners to put in new Bosch coils if running rich is a problem, or just keep on hand for the future. The r&r swap to the new coil is easy on the Mondial t- remove 4 screws and the electrical connect. If my coil was failing with only 26K on the odometer, yours might be next.
    Just my 2 cent fix-it for today.
     
    Wade and Drewbdo like this.
  2. JLF

    JLF Formula 3
    Silver Subscribed

    Sep 8, 2009
    1,060
    Dallas
    Full Name:
    JERRY
    Very good info, thanks!
     
  3. aec

    aec Karting

    Jul 28, 2011
    121
    Weston, MA
    Thanks for this very useful post. I have been having intermittent Bank 5-8 codes for a while now, and was just about to do the same replacement before this spring arrives. The other bank 1-4 also once went into limp mode a few years ago, probably also due to ignition coil.
     
  4. Wade

    Wade Three Time F1 World Champ
    Rossa Subscribed Owner

    Mar 31, 2006
    30,197
    East Central, FL
    Full Name:
    Wade O.
    #4 Wade, Jan 25, 2020
    Last edited: Jan 25, 2020
  5. Wade

    Wade Three Time F1 World Champ
    Rossa Subscribed Owner

    Mar 31, 2006
    30,197
    East Central, FL
    Full Name:
    Wade O.
    Made by Lisle as well.

     
  6. spicedriver

    spicedriver Formula 3

    Feb 1, 2011
    1,860
    The best way to clean plugs I've found is with a propane torch. It makes them like new again.

    When my wires went bad, I tested the bad cylinder with a Lisle inline spark tester. It showed that there was spark. But the spark wasn't strong enough. So you need to know how to read these things, or else it could throw you off.
     
  7. JLF

    JLF Formula 3
    Silver Subscribed

    Sep 8, 2009
    1,060
    Dallas
    Full Name:
    JERRY
    So, I ordered 2 new coils and the firing order stickers from ricambi. Just peeked into my engine though and noticed the passenger side coil is under the expansion tank. Does the tank have to come out to swap them?
     
  8. Wingnut

    Wingnut Karting

    Feb 11, 2005
    71
    Corolla, NC
    The passenger side coil is more challenging to get to than the driver's side. I did remove the e tank, with a bit of cleaning after it was removed. Plan on a few hours of work for this passenger coil replacement if you find the area around the tank as dirty as I did (and it bothers you).
     
  9. JLF

    JLF Formula 3
    Silver Subscribed

    Sep 8, 2009
    1,060
    Dallas
    Full Name:
    JERRY
    Thanks man, does that require a full coolant change? I would like to have the tank restored however.
     
  10. johnk...

    johnk... F1 Veteran
    Owner

    Jun 11, 2004
    7,908
    New England/FL
    #10 johnk..., Feb 13, 2020
    Last edited: Feb 13, 2020
    FYI:
    Ignition coil
    Bosch 0221503407
    Also 99-2004 Landrover Discovery and Range Rover
     

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