[Saif2018]

Originally Posted by Quick335XI

Anyone have any idea why stft and stf2 are so high in the middle, but actually LOWER up high in the rpm range? is it because the fuel system gets "caught up" later on? I just did this pull and got "superknocking cylinder 3" yet in the log cyildiner 3 shows no timing pulls; only cylinder 4 did.

Here's a log:

https://datazap.me/u/terryeaton/log-...og=0&data=3-21

Have you tried running a less aggressive map, with lower timing to see of the problem still occurs?

Which plugs and coils are you running and when have they been changed?

Had a look at previous log, it doesn't have crazy STFT's, you didn't get super knock code in this log did you?

https://datazap.me/u/terryeaton/log-...-9-10-11-21-22

Would be good idea to send your current log to your tuner with Super knocking code for his input.

[Emrhn]

Originally Posted by Saif2018

No worries,

doesn't look like your battery is the issue.

If only you could check LPFP on N55 as well since failing LPFP could also drag HPFP down,

your HPFP is really low during the initial cold start, mines a N54 and it shoots to somewhere around 2000 psi and then settles at around 700 psi, yours is dropping to ~80psi then climbing after some seconds, difficult to say if its your HPFP at fault since it doesn't drop at WOT

Are you getting long cranks?

Thank you! And yes I am getting long cranks, for almost a year now. Not in summer though, usually in colder temperatures.

[Saif2018]

Originally Posted by Emrhn

Thank you! And yes I am getting long cranks, for almost a year now. Not in summer though, usually in colder temperatures.

The only other thing I can think of is possibly your starter.

[FixingEight92]

Hey all,
I was hoping someone would be willing to look at my logs.
The Car, 135i 157k miles 93 Oct

Relevant Mods, ER CP w/ Tial Q
BMS DCI
VRSF DPs
xHP Stage 3

Logs:
https://datazap.me/u/fixingeight92/m...og=0&data=3-21
https://datazap.me/u/fixingeight92/m...og=0&data=3-21
https://datazap.me/u/fixingeight92/m...og=0&data=3-21

Thanks!

[Saif2018]

Originally Posted by FixingEight92

Hey all,
I was hoping someone would be willing to look at my logs.
The Car, 135i 157k miles 93 Oct

Relevant Mods, ER CP w/ Tial Q
BMS DCI
VRSF DPs
xHP Stage 3

Logs:
https://datazap.me/u/fixingeight92/m...og=0&data=3-21
https://datazap.me/u/fixingeight92/m...og=0&data=3-21
https://datazap.me/u/fixingeight92/m...og=0&data=3-21

Thanks!

Looks fine, FMIC upgrade next

[FixingEight92]

Originally Posted by Saif2018

Looks fine, FMIC upgrade next

Gotcha. Thanks for the look over

[Saif2018]

Originally Posted by FixingEight92

Gotcha. Thanks for the look over

No worries mate.

[ab987]

Well, I think I've cursed myself after praising my Walbro 535. Getting some absolutely wild LPFP fluctuations on E54, and HPFP also may be getting pulled down too (I think I've hit the HPFP's happy limits anyways). Could it be a bad low pressure sensor or is this expected? Avg pressure is somewhere in the 60s/70s but the spikes hit the high 40s and low 110s. Any ideas?

https://datazap.me/u/ab987/2-3?log=0...3-13-23&solo=3

[Ethan Skinner]

Could someone take a quick look and see if my boost and fueling looks normal on this log? MHD E30 FBO N55 E92

https://datazap.me/u/ethan-skinner/e...og=0&data=3-12

[rhzo10]

Hello all, anyone mind reviewing my log?

I am experiencing both bad rail pressure dips and boost spikes post-shift (dct trans). Noticing at one point that my fuel trims max out at +34, is this due to my weak hpfp that can't keep up? HPFP is OEM and was replaced two weeks ago. Targeting 19 ish psi on Pure 600 turbos, custom-tuned, Walbro 525 lpfp on e40 mix.

Is my hpfp causing these issues or something else? Was told PI was my only option but don't want to go PI unless it will fix my issues.

https://datazap.me/u/armandolabrada/....50&tmax=49.95

[Saif2018]

Originally Posted by rhzo10

Hello all, anyone mind reviewing my log?

I am experiencing both bad rail pressure dips and boost spikes post-shift (dct trans). Noticing at one point that my fuel trims max out at +34, is this due to my weak hpfp that can't keep up? HPFP is OEM and was replaced two weeks ago. Targeting 19 ish psi on Pure 600 turbos, custom-tuned, Walbro 525 lpfp on e40 mix.

Is my hpfp causing these issues or something else? Was told PI was my only option but don't want to go PI unless it will fix my issues.

https://datazap.me/u/armandolabrada/....50&tmax=49.95

Post shift spikes are common/normal, wouldn't worry about them.

I'm not a expert by any means but it looks like you need port injection, the HPFP and LPFP setup isn't enough for your fueling needs.

Do you have a 93oct log to check HPFP psi is holding above 1500 psi?

If it is, I'd say your HPFP is fine.

Your LPFP looks fine.

[rhzo10]

Originally Posted by Saif2018

Post shift spikes are common/normal, wouldn't worry about them.

I'm not a expert by any means but it looks like you need port injection, the HPFP and LPFP setup isn't enough for your fueling needs.

Do you have a 93oct log to check HPFP psi is holding above 1500 psi?

If it is, I'd say your HPFP is fine.

Your LPFP looks fine.

I appreciate the feedback.. unfortunately, I only have a custom e40 map, think it'd be okay if I flashed a stage 1 93 oct map to record a log?

Also, is a stage 3 lpfp setup required even if I don't plan on running full e85 w/pi for the time being?

[CarAbuser]

Originally Posted by rhzo10

Hello all, anyone mind reviewing my log?

I am experiencing both bad rail pressure dips and boost spikes post-shift (dct trans). Noticing at one point that my fuel trims max out at +34, is this due to my weak hpfp that can't keep up? HPFP is OEM and was replaced two weeks ago. Targeting 19 ish psi on Pure 600 turbos, custom-tuned, Walbro 525 lpfp on e40 mix.

Is my hpfp causing these issues or something else? Was told PI was my only option but don't want to go PI unless it will fix my issues.

https://datazap.me/u/armandolabrada/....50&tmax=49.95

The shifts don't look good in that log. The timing drops for a full half second, during the shift. Tuner probably doesn't understand the DCT.

Your rail pressure needs attention. A new HPFP might help, I don't think you should be struggling like that on E40. Also quite a few serious timing corrections. I'd lower the boost for now then re-evaluate after you fix the HPFP.

[rolandj24]

https://datazap.me/u/rolandj24/log-1...&data=4-5-7-17

i’m not sure if i’m doing this right but seems like i hit about a max of 10 psi? stage 2 mhd n55 with upgraded intercooler and all bolt ons car feels sluggish for the tune and mod setup not sure if i got to right rpms i’m very new. this is on 91 i was about to go on e30 but i don’t think the fueling is what i need to make the power i should

[n54joe]

Made a new log for my current setup. Hoping everything looks okay, my limited knowledge thinks it looks okay.

This run was MHD V5 E40 Stage 2+ map.
https://datazap.me/u/n54joe/3rd-gear...0&data=2-21-24

[Saif2018]

Originally Posted by CarAbuser

The shifts don't look good in that log. The timing drops for a full half second, during the shift. Tuner probably doesn't understand the DCT.

Your rail pressure needs attention. A new HPFP might help, I don't think you should be struggling like that on E40. Also quite a few serious timing corrections. I'd lower the boost for now then re-evaluate after you fix the HPFP.

He did say he replaced the HPFP recently, do new ones fail this quick?

[Saif2018]

Originally Posted by rhzo10

I appreciate the feedback.. unfortunately, I only have a custom e40 map, think it'd be okay if I flashed a stage 1 93 oct map to record a log?

Also, is a stage 3 lpfp setup required even if I don't plan on running full e85 w/pi for the time being?

No worries mate.

I just wanted to see your HPFP psi on 93oct map for the Pure600 you have. Stage 1 won't help as its for OTS stock turbos.

I don't think your LPFP is causing any problems, CarAbuser (who is more knowledgeable than me) did mention your HPFP is probably failing, which is possible, just find it surprising that a 2 week old one would fail this quickly.

The previous log you posted on datazap, is this with the new HPFP?

[Saif2018]

Originally Posted by rolandj24

https://datazap.me/u/rolandj24/log-1...&data=4-5-7-17

i’m not sure if i’m doing this right but seems like i hit about a max of 10 psi? stage 2 mhd n55 with upgraded intercooler and all bolt ons car feels sluggish for the tune and mod setup not sure if i got to right rpms i’m very new. this is on 91 i was about to go on e30 but i don’t think the fueling is what i need to make the power i should

Looks like a massive boost leak, no wonder it feels sluggish. Your better of posting in the N55 forum section though.

[ozi]

Hi yesterday i had the half enginelight after light acceleration. Codes were
29F1 and shadowcode 2AAF and i cleared them. I felt engine were bit smoother after clearing codes.
I did log and drove normally in afternoon traffic. In the log rail pressure is jumping up and down. That cannot be normal ?
I dont know the age of either pump or sensor. Injectors are index 12 if that matters in this situation.


https://datazap.me/u/dille/log-16386...-4-14-19-20-21

[tej98]

Can I get a review on this log? A couple months ago I swapped out bank 1 injectors with all index 12s since I had a leaky injector there. I'm seeing STFT on bank 1 swing up, does this indicate a problem there? (Still learning here). Bank 2 has 2 index 5s and 1 index 6.

It is worth mentioning that I did not reset adaptations at all. Should I do that?

Thanks in advance!

https://datazap.me/u/tej98/log-16386...=3-19-20-21-22

[Saif2018]

Originally Posted by tej98

Can I get a review on this log? A couple months ago I swapped out bank 1 injectors with all index 12s since I had a leaky injector there. I'm seeing STFT on bank 1 swing up, does this indicate a problem there? (Still learning here). Bank 2 has 2 index 5s and 1 index 6.

It is worth mentioning that I did not reset adaptations at all. Should I do that?

Thanks in advance!

https://datazap.me/u/tej98/log-16386...=3-19-20-21-22

You could reset adaptations but have you coded the injectors?

Index 12s are not supposed to be mixed with Index 10 or later injectors, although some people have got away with it.

I would swap injectors from both banks and see if STFT follow first

[tej98]

Originally Posted by Saif2018

You could reset adaptations but have you coded the injectors?

Index 12s are not supposed to be mixed with Index 10 or later injectors, although some people have got away with it.

I would swap injectors from both banks and see if STFT follow first

Thanks! Yeah, I reset adaptations and ensured that all the injector flow rates are coded properly (I used INPA). It was my understanding that official guidance from BMW was to keep each bank either on all index 11/12, or they could mix indexes as long as they were below 11.

I currently have bank one with all index 12s and bank two with two index 5s and one index 6.

I pulled another log after resetting lambda adaptations and have the exact same results. The maximum difference in STFTs between banks is ~13%, with bank one at 18% and bank 2 at 5%. AFRs are still steady at ~12 for both banks.

Do the trims max out at 34%? If so, I'd think there should be plenty of headroom for fluctuation by the DME if needed. Or is that generally not enough?

Thanks!