Faulty Fuel Pressure Sensor

Discussion in 'Mazdaspeed 3 Troubleshooting Knowledgebase (07-13)' started by Chmiggle, Sep 27, 2022.

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  1. dinnerplate

    dinnerplate Platinum Member

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    As far as desired vs actual pressure, it seems to match up exactly to what my ECU sets as the desired pressure, all the way up to just barely under 1900 (at which point the PRV has already cracked open anyways and is actively bleeding pressure). I couldn't find any hard numbers for rating like I could when I contacted Bosch about their sensors, but I figured since modern i4 EcoBoosts are based on MZR L3-VDTs it might've worked (plus ST users report similar HPFP throughput as speeds), and as far as my testing goes, it seems to do just fine as a replacement for a Bosch sensor.

    I honestly don't feel like pulling my intake manifold off again just to swap back to my Bosch sensor (at this point I've got a collection of 4 fuel pressure sensors lol, my bad original, *38, *53, and the Ford sensor), so I'm just going to leave to Ford one on and I'll report back if I notice any issues or premature failure.

    Also important to mention: the sensor in question has to be from a 2015+ ST specifically. RS's use a different connector housing, even though the pinout is the same, and 2013-2014 STs used a different sensor.
     
    Last edited: Oct 1, 2024
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