25 responses

  1. Andres
    June 4, 2016

    Question: If you dont have any upgrade and the first one is the hight pressure fuel pump upgrade. Theres gonna be any problem with the injection? Do you gonna leak and lose more fuel by the injectors? or all the sensors control the fuel presure and its going to work as a normal one until perform the changes?

    Reply

    • CorkSport
      June 7, 2016

      The system has a spill valve so there will be no problem with the injection. The bigger problem is not getting enough fuel which is why the upgraded pump internals are needed.

      Reply

  2. Joey
    June 14, 2016

    How do the replacement parts create more flow AND pressure? How long will they last? Are they E85 compatible?

    Reply

    • CorkSport
      June 14, 2016

      Check out our white paper on the fuel pump internal design.

      Link

      Reply

  3. Joey
    June 15, 2016

    Is it E85 compatible?

    Reply

  4. Jake
    June 17, 2016

    In the morning my car has a hard start and tries to stall. But once the car is warm it idles perfect. When I try to start the car when it’s warm it’s very hesitant. Ecu fried, got a used ecu and ever since then car is slower and has this starting problem. Help! Haha

    Reply

    • Jake
      June 17, 2016

      Also according to the accessport I’m getting no voltage to the hpfp sensor

      Reply

      • CorkSport
        June 17, 2016

        Give us a call at 360-260-2675

        Reply

      • Mathew
        July 7, 2016

        Hi, my car also reads 0 volts to the split valve. I think its just a error with the ap but if that was the true case then you wouldnt have fuel pressure. It is strange to say the least. I have cleaned grounds and sensors and everything with no luck.

        Reply

  5. Joey
    June 17, 2016

    What is the compatibility with E85?

    Reply

  6. Stephen Billings
    June 24, 2016

    I have a 2008 mazda speed 3 and I am having a problem with the fuel pressure just dropping out after a few minutes of running. I have replaced the in tank fuel pump. the HPFP, the HPRV and the crankshaft sensor and still the same thing happens. What could it be?

    Reply

    • Mathew
      July 7, 2016

      Did u check the relay? It stalls when it warms up correct? Look on msf. Some people have been having this issue lately.

      Reply

  7. cs_vinny
    July 13, 2016

    Joey, The internals are E85 compatible, but if you plan on running it in your fuel system I always recommend the addition of an extra inline fuel filter to help keep containment’s from entering the HPFP housing.

    Reply

  8. Jacob
    October 21, 2016

    I recently had my motor rebuilt. My hpfp apparently worked when he had it built but when I got the car back I couldn’t accelerate as it would bog and hesitate. I looked st accessport and as I drove my hpfp pressure was around 60-70 psi. I then monitored my hpfp sensor voltage and it was at 0. What could my issue be?

    Reply

  9. Zac
    November 21, 2016

    I just installed my HPFP internals yesterday and broke the internals in with a 100 mi cruse keeping the loads lite (under 3000 rpm before shifting) and noticed a fuel pressure range on my accessport that concerns me. Is there an optimal pressure range that would let me know the install was a success? I have not tried a WOT scenario yet.

    Reply

  10. Tim
    November 27, 2016

    Hey guys,
    I recently purchased the corksport internals to go along with my new motor, and when i started it for the first time, all boost leaks and fuel leaks and seal screw oring everything was 100%, but i was getting a really bad erratic idle and was pig rich. In many conditions under throttle you would hear like a banging or a pop of some sort, i was thinking maybe it could be a leaking injector, turns out i pulled the rail and the injector closest to fuel pump was leaking bad like it was pushing itself out under high pressure and i believe thats what was creating the noise? Am i correct to think this? And my other question is, could this have been causing the extremely rich condition and erratic idle? Thanks

    Reply

    • Tim
      November 27, 2016

      Too add to the above comment, i only was getting the rich situation with the corksport internals, i swapped the stocks back in and it went away but it still at that point had the popping noise under certain throttle occasions, so am i to believe that with the new internals it caused a worse leaky injector with the stronger pressure causing the injector to leak constantly and causing a rich erratic idle? Sorry if this is hard to understand, but its not the easiest to explain. Thanks, but like i said i found i had a leaking injector seal and it seems like the sound was coming from that area. So im planning on ordering the corksport seals, but i was curious though as to with the new seals, would it be safe to reinstall the corksport internals believing that the new seals will have corrected the rich idle state?

      Reply

  11. Andrew Rhoades
    May 2, 2017

    Have a question, Have a MS3 2010 that was bought used. Was told it had Corksport internals. My fuel rail psi at idle is 400 to 420 and at load spikes up to 2070 psi. Have not cracked my fuel pump open to visually confirm because the psi is matching what big internals should be pushing for psi. My MS3 has ko4 rebuilt with Bigger seals journal bearing and CHRA billeted but only running about 20PSI. Also 3″ DP with Racepipe, Weapon Cold AIR, Bigger MAP, Turbo Inlet and Weapon Turbo manifold. Putt a cobb AP on with Stage3 tune. After a week I Started getting hesitation from 2900 to 6500 rpm like it was blocked or was not getting fuel. Swapped to stock tune and everthing was right again. Fuel internals? Bad Pump? Sounds like I still have oem internals. Please give me your thoughts.

    Reply

  12. Nicholas
    June 30, 2017

    Hey corksport,

    I’m having an issue with my fueling I don’t have the fuel pump internals yet, however I have a check engine light that says cylinder 1 misfire, and injector 1 circuit fault. Sometimes the car loses all acceleration and will idle below 500rpms mazda said that it could be the injector, then my buddy (he owns shiftfast Motorsports) said it’s a common issue for these pcm systems to have electrical problems and that I’d have to replace the pcm because it’s sending the wrong signal and the injector maybe stuck open because of that. Current mods: Corksport Stage 2 intake, and RMM

    Reply

    • CorkSport
      July 5, 2017

      The PCM having electrical problems is pretty rare on these cars. Due to the fact that you have a CEL pointing directly at the injector, then i would take it somewhere and have them check to make sure it is getting constant power. Try that and go from there 🙂

      Reply

  13. Bryce Sponsler
    August 1, 2017

    Please help! My 2008 Mazdaspeed 3 has very rough idle because the fuel pressure is around 80. I’m also getting a loud chattering noise from the hpfp. I thought it was bad so I replaced the entire hpfp with CPE. Still no fix. Could this be the fuel pressure relief valve?

    Reply

    • CorkSport
      August 2, 2017

      That does sound like the pressure relief valve.

      Reply

  14. Los Perez
    September 23, 2017

    I’m having an issue with a intermittent fuel pressure drop. I have gotten the code P0089 for the fuel pressure regulator. There were times where this drop would last 5-10 minutes. My pressure goes down between 60-75 psi. If I shift into neutral and Rev alittle bit it goes away. I started to poke around looking for any obstructions on any vacuum /fuel lines…. Connections on sensors or anything visual I could find that was obvious. Tightens all hose clamps and sensor connections and my car ran fine for about two weeks…. Thought I remedied the issue. Now it has come back only dropping fuel pressure for maybe a second or two. And this happens maybe once a week. Does any of this sound familiar or helpful to diagnose? My car is pretty well built and I’m running autotech fuel pump internals

    Please help!!!!!

    Reply

  15. Cal
    November 28, 2017

    My 2012 MS3 RPM’s are dipping and the car seems like its choking, but isn’t dying. Could this be a sign of a weak HPFP or anything in that nature? I have a new HPFP Sensor, new O2 Sensors, EGR Valve, and much more. But now, whenever I even touch the gas it starts to choke and the RPM’s dip up and down quickly, sorta like as if I was touching the gas and letting go constantly, but won’t die. I have the HPFP Internals with me, just trying to figure out the issue first. PLEASE HELP

    Reply

    • Kim Molina
      December 5, 2017

      give us a call directly! 360 260 2675 the guys are always willing to help!

      Reply

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