[thebigbag]

So I recently got a set of used index 12s at a reasonable price. Put new seals and decouplers on and my car was doing fine before but now I have cylinder 5 misfire and something going on with my fuel ill show the logs...

https://datazap.me/u/thebigbag/feked...-9-15-16-18-19

https://datazap.me/u/thebigbag/lllll...ta=15-16-18-19

So my fuel rail pressure is very low and my car is running dangerously lean at low rpm so I assume its the hpfp but not 100 percent sure any info on my situation would be greatly appreciated.

[Sgop335]

Did you code them? 6?
The stft bank 2 is tanked in the first log. Mismatch in ltfts too. Tried a lamda adaptations reset?

[thebigbag]

I have reset adaptations and coded them in via protool.

[feuer]

Ok so why replace all injectors when engine was running fine?

[thebigbag]

They were old index 7s and 8s so I figured I would upgrade.

[Sgop335]

Yea why bother replacing. None of my cars have index 12, yet anyway
It is likely one or more injectors may be defective? We also cant see lamda recovery to 235 in the logs

[thebigbag]

Yeah in the logs the first is just me cruising and the other is a wot pull but it does recover fine but I was just trying to do some preventing maintenance but what I can get my head around is the low rail pressure like the missfire comes and gos only on cyl 5 and I checked the voltage on the injectors when it was missing and it checked out there was no fluctuations

[thebigbag]

Could it be possible that I have a leak somewhere or a bad fuel rail pressure sensor causing the rail pressure to read wrong there for it would run lean?

[ky0u]

Originally Posted by thebigbag

Could it be possible that I have a leak somewhere or a bad fuel rail pressure sensor causing the rail pressure to read wrong there for it would run lean?

Quick check:
Did you look for leaks /can you smell gas in the engine bay around the fuel rail and high pressure lines?

Did you double check tightness on all the rail connections and high pressure lines. (idk which ones specifically you loosened during your service but there should be 15 in total)

[thebigbag]

I just did all of them are tightened and are not leaking also just to add i have been getting mixture control 1&2 codes along with 2AAF fuel pump plausibility but the pressure on my low fuel side seems to be ok normally reading between 65-75

[ky0u]

Originally Posted by thebigbag

also just to add i have been getting mixture control 1&2 codes along with 2AAF fuel pump plausibility

As in after the service? Or since before the service?

[thebigbag]

It has happen before I got the new Injectors but it was just a simple clear and it didn't come back for awhile now its everytime I start it