F430 no fuel pressure on right fuel rail | FerrariChat

F430 no fuel pressure on right fuel rail

Discussion in '360/430' started by Machi Medrzycki, Nov 21, 2020.

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  1. Machi Medrzycki

    Aug 6, 2018
    14
    Kenner
    Full Name:
    Machi Medrzycki
    Started my 2007 F430 last Sunday and blinking check engine light came on (I have cat-less headers so I’m used to check engine light). Car sounded different and felt sluggish while driving and didn’t build up power so we determined cylinder #3 had misfire.
    We changed all plugs and coil pack and car ran fine for 15-30 minutes, and afterwards lost fuel pressure to entire bank of cylinders on right side (same side as original issue with cylinder #3). Fuel pump is getting power. Help??!
     
  2. fotostars

    fotostars Formula Junior

    Feb 6, 2015
    341
    Bay Area
    There is only one fuel line between the output of the pump and the rail so assuming you don't have a massive leak from the said line, I'd say your fuel pump is busted.
     
  3. one4torque

    one4torque F1 Veteran
    Silver Subscribed

    May 20, 2018
    5,167
    Houston
    Full Name:
    One4torque
    Agree if getting power to the fuel pump and still inop— then bad fuel pump.
     
  4. Machi Medrzycki

    Aug 6, 2018
    14
    Kenner
    Full Name:
    Machi Medrzycki
    Thank you, that’s the next logical step to pull it out and test it. Yes, no gas smell and the pumps are original to the car so 13 years old. I’ve read that about how long they last. Thank you for the info!!
     
  5. Machi Medrzycki

    Aug 6, 2018
    14
    Kenner
    Full Name:
    Machi Medrzycki
    Thanks!!
    Any other items that potentially could be the problem in your opinion?
     
  6. Qavion

    Qavion F1 World Champ
    Silver Subscribed

    Feb 20, 2015
    11,779
    Sydney
    Full Name:
    Ian Riddell
    Can you confirm how you knew you had power at the pump? Could you hear it running or did you measure the voltage?

    If there was voltage, I assume the relays and ECU control were ok (The pump is commanded to run when engine rpms exceed 40rpm).

    Not Ferrari-specific, but I would check the fuel filter for signs of rubber/plastic debris. Also, check the fuse & holder to see if there is any melted plastic. Failing pumps sometimes have a tendency of putting stress on the electrical system.
     
  7. Machi Medrzycki

    Aug 6, 2018
    14
    Kenner
    Full Name:
    Machi Medrzycki
    Yes, we checked voltage, checked fuses before than and all is looking correct without any visible issues in the fuse box.
     
    Qavion likes this.
  8. mello

    mello F1 Veteran
    Silver Subscribed

    Jul 12, 2013
    5,056
    CA Bay Area
    Full Name:
    Steve
    I would try reversing polarity on the fuel pump connector temporarily to see if you can unjam it. I'm a cheap bastard.
     
    Qavion likes this.
  9. Machi Medrzycki

    Aug 6, 2018
    14
    Kenner
    Full Name:
    Machi Medrzycki
    Thanks!! We will do so tomorrow


    Sent from my iPhone using FerrariChat.com mobile app
     
  10. Machi Medrzycki

    Aug 6, 2018
    14
    Kenner
    Full Name:
    Machi Medrzycki
    Pump is dead, reversed polarity did not work
     
    Qavion and armedferret like this.
  11. 24000rpm

    24000rpm F1 Rookie

    curious, how do you know the ecu commands the pump to run if over 40rpm?

     
  12. Qavion

    Qavion F1 World Champ
    Silver Subscribed

    Feb 20, 2015
    11,779
    Sydney
    Full Name:
    Ian Riddell
    Says so in the Workshop Manual ;)
     

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