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355 F1 pump no power

Discussion in '348/355' started by Ferrarista98, Jul 29, 2023.

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  1. Ferrarista98

    Ferrarista98 Formula Junior
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    #1 Ferrarista98, Jul 29, 2023
    Looking for some advice from the brain trust here. The battery in my 355 recently went dead after sitting too long. Replaced it with an Antigravity Lithium battery as I have had good experience with those in my Porsche’s. Went to turn car on and everything lights as it should, however my F1 pump is not getting power. I have a Scud Ing Swiss relay and the diagnostic module does not show any power. The F1 light on the dash flashes but I do not hear the pump priming. The pump was working fine before the battery change.

    I have checked the 2 maxi fuses in the passenger footwell and both are intact and normal.

    Any suggestions on where to look next?


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  2. Qavion

    Qavion F1 World Champ
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    #2 Qavion, Jul 29, 2023
    Time to break out the voltmeter...

    Is power getting to the maxi fuseholders? Is it a full 12 volts? Is power actually getting to the Scud-Ing Relay socket?

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    Does the F1 system have its own battery terminal lug or is the all the wiring crimped into one lug? Who changed the battery?

    Do these pumps freeze if they are not activated for a while? Can you hit something with a rubber mallet? :p

    Is the driver's door switch (near the hinge) springing out? Do the interior lights come on?
     
  3. Ferrarista98

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    #3 Ferrarista98, Aug 3, 2023
    Thank you very much, will be trying these suggestions out tomorrow and will report back on what I find.
     
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  4. WATSON

    WATSON Two Time F1 World Champ
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    #4 WATSON, Aug 4, 2023
    Just an observation, the interlock switches in the doors and hoods will not prevent the pump from running. It will prevent the car from selecting a gear.

    If the hood is open and you start the car, the pump will run, the light will flash until pressure is achieved and then go out as normal.

    Trying to select 1 or R will briefly show the gear in the indicator, beep and drop back to neutral.

    Personally, I would work backwards and start looking for 12 volts at the pump and chase it back through the relays and fuses if necessary.
     
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  5. Qavion

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    #5 Qavion, Aug 4, 2023
    Ah.. maybe I was thinking of the 360. The pump runs when you open the door.
     
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  6. WATSON

    WATSON Two Time F1 World Champ
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    #6 WATSON, Aug 4, 2023
    Having played this game since I was 16, seeing the 12 volt meter, or 12 volt test light can be a pain.

    I bought a little 12 volt siren years ago and put some clips on the leads.
    I use it when checking things like fuel pumps under the trunk, etc.
    Clip it in.
    Hit the key.
    If it makes noise, you've got power.
     
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  7. Ferrarista98

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    #7 Ferrarista98, Aug 12, 2023
    All great suggestions, thanks everyone! I traced back from the pump plug (no power) to the pump relay, where I encountered 12V. Since I upgraded my relay to the Scud Ing Swiss unit, I noticed the red warning light was on continuously which means there has been a fault and it needs to be reset and is in lockdown mode. Easy enough, switch battery off and back on. No more warning light, pump primes and reaches pressure with no warning lights / sounds.

    Thankfully an easy fix this time likely due to jump starting the car when my prior battery died. Will be sure to save the diagram for future adventures. Thanks again everyone.


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  8. Qavion

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    #8 Qavion, Aug 12, 2023
    I forgot about the lights. I suppose there would be no lights if the relay wasn't getting power. I see on some versions (at least), you can push some buttons to force the pump to operate. If it did (and you also had lights), you can probably assume that the TCU is not sending a command to the relay.

    Ah.. I thought you had already established no power at the pump plug.

    Did you just mean it wasn't making any sounds?
     
  9. Ferrarista98

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    #9 Ferrarista98, Aug 13, 2023
    I think the sequence of events was I had to jump the car and then subsequently replace the battery. In the course of that happening the pump relay detected an electrical fault and went into lockdown mode to protect the pump. I didn’t realize this as at first the indicator lights were all dark so I thought no power to the relay. After remove the back panel behind the driver seat, turning off the battery, and plugging and unplugging the relay, it came back on showing the power light and warning light meaning it’s still in lockdown mode which cuts power to the pump (hence no power at the pump plug). Another reset of the battery by turning on and off took it to the next level.

    For reference, the pump light on the dash was always working and flashing but I could clearly hear the pump not turning on until I completed the above steps.
     
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  10. rosso ferrari

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    #10 rosso ferrari, Sep 6, 2023
    buenos días amigo se me murió la bomba de gasolina de mi 355 gts quisiera preguntar si existe algún kit para reemplazar la bomba original? gracias
     
  11. Qavion

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    #11 Qavion, Sep 6, 2023
    This is an F1 pump message thread ;)

    I believe Bosch don't make the fuel F355 fuel pump anymore. It was P/N 0 580 254 011 (128 L/Hr) or # 69535.

    Have you removed the old one? The rubber components are known to rot. You may need more than just a pump. For example (see red box):

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    Non-perishing gaskets are available (item #8) from places like Ricambi (USA).

    It seems that replacement pumps come in two diameters???

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  12. rosso ferrari

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    #12 rosso ferrari, Sep 8, 2023
    Hola amigo, la goma que saqué aún está en buen estado y le hice revisar la presión de la bomba pero no tiene suficiente presión para arrancar el motor. Queria preguntarles cual es la pagina web donde puedo conseguir la bomba porque Ricambi America no la tiene.
     
  13. Qavion

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    #13 Qavion, Sep 8, 2023
    Have you tried parts sellers in Europe? Eurospares, Superformance UK, Maranello Classic?

    For example:
    https://www.superformance.co.uk/355/fuel.html
    https://www.eurospares.co.uk/Ferrari/355/355_(5.2_Motronic)/PartDiagrams/009/Fuel_Pump_and_Pipes

    What is the pump part number?
     
  14. WATSON

    WATSON Two Time F1 World Champ
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    #14 WATSON, Sep 8, 2023
    "Hello friend, the rubber that I removed is still in good condition and I had the pump pressure checked but it does not have enough pressure to start the engine. I wanted to ask you what is the website where I can get the pump because Ricambi America doesn't have it."
     
  15. rosso ferrari

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    #15 rosso ferrari, Sep 10, 2023
  16. Qavion

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    #16 Qavion, Sep 10, 2023
    Last edited: Sep 10, 2023
    What car is this for? Motronic 2.7 dual pump? Motronic 2.7 single pump? Motronic 5.2?

    What is your vehicle assembly number?

    What part number did you remove? What is the diameter of the old pump?

    Motronic 2.7 (dual pumps) 50mm diameter (Ferrari P/N 155592) Possibly Bosch 0580 464 990
    Motronic 2.7 (single pump) 53mm diameter (Ferrari P/N 140317 or 52mm diameter (Ferrari P/N 948829) 5 bar pressure.
    Motronic 5.2 (single pump) 53mm (Ferrari P/N 140317) or 52mm (Ferrari P/N 948829) 5 bar pressure. Possibly Bosch 0580 464 997 or 0 580 254 011
     
  17. Qavion

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    #17 Qavion, Sep 10, 2023

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