Low fuel pressure’s and injector cutout at wot

[TheLeastReliableN54]

drove my car hard one way (no issues). Parked it for a while, got back in and floored it from the bottom of 2nd (warm) and it sounded like it hit a rough fuel cut. Car starts sputtering and is in a limp mode. Turned the car off and on and it drove home just fine

Anytime I go wot now it does the same thing
And it seems to be taking longer to crank.

Since then I’ve seen codes:
29DC - DME: Cylinder injection cutout.


2A2D - DME: Fuel low-pressure system, fuel pressure.

New-ish stage 2 lpfp btw (17t 91 tune)
(Included a data log of a pull + start up)

 

[swellengear]

Sounds and looks like your HPFP. That being said, your low fuel pressure is also low, its reading at about half of what it should be (50-70psi), so could be starving the HPFP. You will need to do a proper log. WOT from about 2000rpm in 3rd, try and include the shift to the 4th.

 

[chef423]

Did you ever find a fix for this? I am getting the same.

 

[swellengear]

Did you ever find a fix for this? I am getting the same.

If you're getting the same codes, it's most likely a failing hpfp. If you can, upload a log so we can have a look at your low and high fuel pressures.

 

[TheLeastReliableN54]

Did you ever find a fix for this? I am getting the same.

Yes! I highly recommend data logging your stft 1&2. A 10-/+ difference is values can indicate issues
Whichever bank is dipping should have your injector issue.
Injector issues will also affect rail pressure as it’s trying to pull fuel from the injectors

 

[TheLeastReliableN54]

Sounds and looks like your HPFP. That being said, your low fuel pressure is also low, its reading at about half of what it should be (50-70psi), so could be starving the HPFP. You will need to do a proper log. WOT from about 2000rpm in 3rd, try and include the shift to the 4th.

Ended up being a bad/dirty injector.

 

[chef423]

Yes! I highly recommend data logging your stft 1&2. A 10-/+ difference is values can indicate issues
Whichever bank is dipping should have your injector issue.
Injector issues will also affect rail pressure as it’s trying to pull fuel from the injectors

New Index 12 injectors just 2 yrs ago. I honestly believe I got some bad gas. I did post about this in the N54 forum just last night as well.

Thanks for responding.