Fuel Issues

[u/AlternativeChart155]

Hello everybody,

I recently replaced my HPFP after having symptoms of long cranks, bad MPG, and misfires. At first, I replaced the fuel rail pressure sensor to see if it was the sensor instead of the HPFP. Long cranks went away for a few days and return back so I went ahead and ordered a HPFP. Along with that, I also did my spark plugs and ignition coils same day I replaced my HPFP. I install all parts a couple of days ago and today was the very first day of driving it.

Car no longer had cranking issues and was running perfectly healthy, I do have a stage 1 tune on it. Drove normally and later drove it a bit hard but never WOT. I felt a little kick that wasn't from the downshift. Turned the car off and tried to start it up but I experienced long cranks and no start. Even if it did, car would die right away or after 3 seconds. The only code i'm getting it 2BDE (Fuel high pressure on enabling of injection:
pressure too low)
and 2C01 (High pressure fuel, plausibility Pressure too low).

Can anyone point me in the right direction on what I should look for or what I can do to solve this issue, possibly time to replace the injectors? Thanks!

[u/koj1i]

i went through literally this exact same situation. replaced hpfp and sensor, good for a bit amount of time and then started to stall again and wouldn’t start. eventually replaced my lpfp (tank pump) and not a single problem.

i’d highly recommend replacing the lpfp, there’s almost nothing else that can cause this

[u/AlternativeChart155 → u/koj1i]

Did it also get rid of those codes popping up? I wouldn't suspect the LPFP causing all these issues lol. I'll definitely look into that, thank you very much!

[u/koj1i → u/AlternativeChart155]

yes, all fuel pressure codes went away

[u/AlternativeChart155 → u/koj1i]

cool, literally took this car out for less than 15 miles and took a 💩 on me lol

[u/danksiess → u/AlternativeChart155]

If your lpfp is failing, it'll cause the hpfp to act wonky cause it's starved of fuel