Cold start- perfect/ Hot start- no starter click | FerrariChat
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Cold start- perfect/ Hot start- no starter click

Discussion in 'Mondial' started by JayG, Oct 11, 2024.

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  1. JayG

    JayG Karting

    Oct 9, 2011
    138
    Atlanta, GA
    Full Name:
    Jay G
    #1 JayG, Oct 11, 2024
    Hi all,

    Recently I've developed an issue that has gotten progressively worse. Cold starts are perfect but if I have finished a long drive or sat in traffic, if I turn off the car and try to turn it back on, fuel pump runs but no starter click. Fuel pump on but no starter click but after 15-25 mins eventually it back to normal. It's really sounds like an electrical issue as opposed to mechanical. New fuel pump relay and cleaned existing grounds and cables which look ok and still the same issue. For those who have dealt with this specific hot start problem, is this one of the maladies cured by the upgraded fusebox replacements out there? Adding grounds?


    Thanks, Jay
     
  2. Alden

    Alden F1 Rookie
    Rossa Subscribed

    Apr 25, 2010
    3,600
    Central Florida
    #2 Alden, Oct 11, 2024
    Search for the "WR1 relay" mod. Might help or cure your problem.
    Alden
     
    JayG likes this.
  3. JayG

    JayG Karting

    Oct 9, 2011
    138
    Atlanta, GA
    Full Name:
    Jay G
    #3 JayG, Oct 11, 2024
  4. Alden

    Alden F1 Rookie
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    Apr 25, 2010
    3,600
    Central Florida
    #4 Alden, Oct 11, 2024
    That's it! I bought the kit for my car a long time ago, but haven't installed it because I'm not having any problems with the starter electrical, yet.
    I do have the upgraded GT parts fuse board in my car, I can't recommend that or Guido's fuse board replacement enough, it solves a lot of problems with our cars!
    Alden
     
    tecmotion and afterburner like this.
  5. FamilyCar

    FamilyCar Formula Junior
    Rossa Subscribed

    Sep 26, 2007
    787
    Seattle, Wa
    Full Name:
    Peter Goodall
    #5 FamilyCar, Oct 11, 2024
    I put the relay in mine and it solved my starting problems.
     
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  6. JayG

    JayG Karting

    Oct 9, 2011
    138
    Atlanta, GA
    Full Name:
    Jay G
    #6 JayG, Oct 12, 2024
    Were the Instructions pretty clear with it? I’m decent with wiring but visuals help more than anything. I went ahead and ordered the kit and I need to install it before really driving the car again. I’ve had too many close calls lately.
     
  7. FamilyCar

    FamilyCar Formula Junior
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    Sep 26, 2007
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    Seattle, Wa
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    Peter Goodall
    #7 FamilyCar, Oct 12, 2024
    It was so long ago I don’t remember. I assume the instructions were adequate, it’s only a few connections.

    I do remember that it took a while to find a spot to mount it. I found a threaded stud on the subframe but I had to get a nut that fit it
     
  8. Alden

    Alden F1 Rookie
    Rossa Subscribed

    Apr 25, 2010
    3,600
    Central Florida
    #8 Alden, Oct 12, 2024
    This might help, there are several threads here about this mod, try a search for WR1 relay instructions/installation.
    There is also an option to install a diode to keep the relay from burning out, but it seems for most cars that are driven weekly, the relay lasts about 2 years and it's a simple/inexpensive matter to just replace it.
    Alden
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  9. FamilyCar

    FamilyCar Formula Junior
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    Sep 26, 2007
    787
    Seattle, Wa
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    Peter Goodall
    #9 FamilyCar, Oct 12, 2024
    My relay has been in place for at least ten years, if not 14. Either I’m getting lucky or have it installed in a protected location.
     
  10. Brooklands

    Brooklands Karting

    Aug 4, 2014
    112
    North Vancouver, BC
    Full Name:
    Phil Delory
    #10 Brooklands, Oct 12, 2024
    I replaced my fusebox with a GT unit 3 years ago. Solved a bunch of issues, but did not help with the occasional starter issue. My car has a momentary contact additional start button some prior owner drilled into the dash leather . Works well, but wish I had the relay.

    new fusebox won’t solve your starter issue as it won’t fix the undersized wiring/voltage drop to the starter solonoid. The relay is your answer as others stated above.
     
  11. JayG

    JayG Karting

    Oct 9, 2011
    138
    Atlanta, GA
    Full Name:
    Jay G
    #11 JayG, Oct 12, 2024
    Ordered the kit and probably going to get started on it next weekend. Thanks all for the recommendation and Alden for the extra visuals. That helps me visualize so much better.
     
    Alden likes this.
  12. JayG

    JayG Karting

    Oct 9, 2011
    138
    Atlanta, GA
    Full Name:
    Jay G
    #12 JayG, Nov 2, 2024
    Alden likes this.
  13. Alden

    Alden F1 Rookie
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    Apr 25, 2010
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    #13 Alden, Nov 3, 2024
  14. theunissenguido

    theunissenguido F1 Rookie
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    Jan 21, 2004
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    Guido
    #14 theunissenguido, Nov 3, 2024
    Hmm, that's not the best place to put a relays. Water is going to enter those connection and who knows let the starter work.
     
  15. JayG

    JayG Karting

    Oct 9, 2011
    138
    Atlanta, GA
    Full Name:
    Jay G
    #15 JayG, Nov 3, 2024
    Let’s find out. I waterproofed the relay connection and it doesn’t get driven in bad weather really ever.
     
  16. moysiuan

    moysiuan F1 Rookie
    Silver Subscribed

    Nov 1, 2005
    4,185
    Canada
    #16 moysiuan, Nov 3, 2024
    Fyi, there is a kit with a waterproof relay that might be good for others to know about.

    https://ceautoelectricsupply.com/product/hot-start-relay-kit/

    The only downside to this relay mod is that if the relay shorted, eg. by getting wet, it could cause the starter to turn over while the car is off and parked. If you left the car in gear, for example when parked on an inclined driveway, the car could lurch forward.
     
    theunissenguido likes this.

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