0V HPFP randomly dies

Discussion in 'Mazdaspeed 3 Troubleshooting' started by Anthony Amador, Apr 7, 2021.

Tags:
Watchers:
6 users.
  1. Anthony Amador

    Anthony Amador GEN1ANTSPD Greenie Member

    Joined:
    Apr 7, 2021
    Posts:
    10
    Trophy Points:
    1
    Location:
    Miami, Florida
    Ratings:
    +0 / -0
    Hey all,

    I'm new to the site so sorry if this has been asked before. ( i searched and couldn't find anything.)
    My 2009 Mazdaspeed 3 is having issues with randomly cutting or losing hpfp pressure, and crazy FT. I randomly get P2178/P2188 at least once a day. My fuel trims will go anywhere from -20 to +20 even while idling.

    I have 0v at my HPFP sensor. It builds pressure fine all day but it will drop to 0 and stay at 0 for about 1 minute then go back to normal.

    MODS LIST
    FMIC
    AP V3
    Cobb intake
    stock turbo k04
    CS Injector seals/New injector o-rings OEM
    New PCV valve OEM
    New spark plugs 1 step colder

    I ordered new MAF sensor OEM, New o2 sensor OEM, New MAP sensor OEM. I also ordered new coilpacks, new recirculation hose.

    I will randomly lose all power, HPFP drops to 0 PSI. 0V HPFP sensor is constant, it never reads any voltage.

    Thanks in advance for any help.
     
  2. Easter Bunny

    Easter Bunny Professional Engineer Platinum Member

    Joined:
    Feb 11, 2016
    Posts:
    1,520
    Trophy Points:
    113
    Location:
    Earth
    Ratings:
    +2,070 / -11
    @Enki

    Stop buying new parts. There is something up with the hpfp
     
    Easter Bunny, via a mobile device, Apr 7, 2021
    #2
    • Like Like x 2
  3. Enki

    Enki Motorhead Platinum Member

    Joined:
    Feb 10, 2016
    Posts:
    1,357
    Trophy Points:
    113
    Location:
    Tucson
    Ratings:
    +2,176 / -3
    Let's see an idle log of the issue please.
     
    • Like Like x 1
  4. Anthony Amador

    Anthony Amador GEN1ANTSPD Greenie Member

    Joined:
    Apr 7, 2021
    Posts:
    10
    Trophy Points:
    1
    Location:
    Miami, Florida
    Ratings:
    +0 / -0
    I purchased the car used, and it has crappy generic parts. I am replacing all with OEM hence all the new parts i'm buying. I will post a log as soon as i get home.

    Anything in particular i should be on the look out for? I was told by previous seller it has autotech HPFP internals. I do not believe him after seeing all the other cheap parts that were on the car. Fuel pressure maxes out at 2025
     
  5. _Mazdarati

    _Mazdarati Resident Asshole Silver Member

    Joined:
    Mar 13, 2017
    Posts:
    474
    Trophy Points:
    93
    Location:
    Dearborn, MI
    Ratings:
    +567 / -3
    You have to pull the internals out of the pump to know. There's no other way to tell.
     
    _Mazdarati, via a mobile device, Apr 7, 2021
    #5
    • Like Like x 4
  6. neganox

    neganox Feline Führer Moderator Platinum Member

    Joined:
    Feb 9, 2016
    Posts:
    1,053
    Trophy Points:
    113
    Location:
    St Johns, FL
    Ratings:
    +2,003 / -5
    • Like Like x 2
  7. Sho

    Sho Silver Member

    Joined:
    Feb 10, 2016
    Posts:
    1,202
    Trophy Points:
    113
    Location:
    Louisville, KY
    Ratings:
    +2,409 / -0
    Hpfp voltage reading zero is normal.

    Sounds like your fuel pump resistor may be unplugged or bad.

    Its in the driver side frame rail under the intake. Looks like an HID ballast. If its plugged in, unplug it and jump the connection. If it stays running without the pressure dropping and the far dying thats your issue. If its currently unplugged, plug it in
     
    Sho, via a mobile device, Apr 7, 2021
    #7
    • Like Like x 3
  8. Anthony Amador

    Anthony Amador GEN1ANTSPD Greenie Member

    Joined:
    Apr 7, 2021
    Posts:
    10
    Trophy Points:
    1
    Location:
    Miami, Florida
    Ratings:
    +0 / -0
    Okay i will check once i'm off work.

    I data logged yesterday but was unable to upload as i left my computer at work. I will get it up asap. I just got another code P0192.
    Someone told me it might be my fuel pressure sensor, but it was fine before i replaced the injector seals with the CS seals. There was oil on my injectors when i removed them. My next move is to remove the HPFP and see the internals, maybe the o-rings. I will be ordering the CS internals to replace the ones i currently have regardless as i'm not so fond of the work that has been done to the car by the previous owner. Whenever i drive regular no WOT the car runs good, but WOT it stumbles, and struggles to get past 5k rpm.

    I will check that resistor, but i believe seeing it and it looked very corroded. Would this cause bad fuel trims?

    Again, thanks so much guys i appreciate all the help.
     
  9. Awafrican

    Awafrican Moderator Silver Member

    Joined:
    Feb 11, 2016
    Posts:
    2,149
    Trophy Points:
    113
    Location:
    Canada
    Ratings:
    +1,635 / -4
    Awafrican, via a mobile device, Apr 8, 2021 at 10:38 AM
    #9
    • Like Like x 1
  10. Anthony Amador

    Anthony Amador GEN1ANTSPD Greenie Member

    Joined:
    Apr 7, 2021
    Posts:
    10
    Trophy Points:
    1
    Location:
    Miami, Florida
    Ratings:
    +0 / -0
    Hey guys I was finally able to upload my data log. I attached some of me driving to work, and some of me idling.
     

    Attached Files:

  11. Enki

    Enki Motorhead Platinum Member

    Joined:
    Feb 10, 2016
    Posts:
    1,357
    Trophy Points:
    113
    Location:
    Tucson
    Ratings:
    +2,176 / -3
    Looks like a car with a stock HPFP to me. Make sure you have Accel pedal position in your logs in the future; best to turn on everything for logging and let your tuner tell you what to omit, but for general troubleshooting like this, have EVERYTHING on.
     
    • Like Like x 1
  12. Anthony Amador

    Anthony Amador GEN1ANTSPD Greenie Member

    Joined:
    Apr 7, 2021
    Posts:
    10
    Trophy Points:
    1
    Location:
    Miami, Florida
    Ratings:
    +0 / -0
    I'm not sure how to set things for my AP to log. What do you mean by everything on? Also, that's what i figured so i ordered a CS HPFP Internals and O-ring rebuild kit.

    Sorry if this is a dumb question. Just trying to learn how this AP works.
     
  13. Anthony Amador

    Anthony Amador GEN1ANTSPD Greenie Member

    Joined:
    Apr 7, 2021
    Posts:
    10
    Trophy Points:
    1
    Location:
    Miami, Florida
    Ratings:
    +0 / -0
    Okay, so now i'm really stumped here. I'm still having the above mentioned issues except as of today my car will not hold pressure with the engine off and key on. As soon as it turn off the pressure drops to 5PSI. I have to crank the car for about 5 seconds then stop and crank again to get it to start. I'm not sure where to begin. I read from CS that it could be a bad in tank pump, in tank pump filter, fuel pump relay, or wiring. What do you guys recommend to try first?

    I have new HPFP Internals arriving next week, and i'm thinking of just upgrading the in tank pump while i'm there. Any recommendations?
     
  14. Awafrican

    Awafrican Moderator Silver Member

    Joined:
    Feb 11, 2016
    Posts:
    2,149
    Trophy Points:
    113
    Location:
    Canada
    Ratings:
    +1,635 / -4
    Awafrican, via a mobile device, Apr 10, 2021 at 9:01 AM
    #14
    • Like Like x 1
Loading...

Share This Page

Users Viewing Thread (Users: 0, Guests: 0)