[E92335ISG]

Originally Posted by vadonchez

You definitely have a problem with fuel supply.
On your 4th gear log, your hpfp is ok but lpfp too low after 4500rpm. Your LTFT is @23% before you WOT and jump up to 30% when you press pedal wot which is too high too me, LTFT should be -5<0<+5% idealy and fall to 0 as soon as you WOT.

I saw your 3th gear wot and it's worse! here your HPFP presure fall below 1500psi after 5500 and up to 600psi only above 6000rpm then your STFT are maxing out to +34% and your afr begin to be lean. On this log too your lpfp pressure is around 45/50psi wich is low for 93oct fuel without ethanol blend.

You should have a problem with lpfp &/or HPFP.

That's not tune related and i think that problem will be there even with over MHD version.

Your boost is ok for V10 2+ with no throttle closure wich is good on this version wich control boost by throttle when v7 control boost by wgdc only.

Hey bro , thanks for the advice , so according to what you said i will get my lpfp changed , walnut blast and have the shop look at my hpfp too

Question: should i change it to 91oct stage 2 for now?

[vadonchez]

to be nonest i don' think octane is the problem, it's fuel supply related,problem should be here even with stock tune.
Try 91 if you want but personnaly i will not run my motor with such fuel problem especially @high load.

Find the problem first then enjoy mhd tune.

[E92335ISG]

So i listened to you guys and tried V10 Stage 2 93 OCT, and things got worse, i even got a superknock DME code on cylinder 2, guys could someone take a look at this log and let me know where I have went wrong, it was a gear 4 pull to 6.4k rpm then I upshifted to 5th and continue for 2 seconds.

current mods: decatted stock downpipes, mperf exhaust non decatted, evolution race CP, forge FMIC, BMS DCI.

Additionally: Yes i do know LPFP is gonna go out soon i have a shadow code for it question i have is could this possibly be the cause of such bad logs? Or is the fuel octane that I use just not up to par? or could it be a coil pack issue? this super knock code really scared the shyt out of me and i went to stage 1+ after seeing this can anyone please advise?

ps. Car has not had a decarbon yet (will go in for it soon) , spark plugs have just been changed one step colder.

https://datazap.me/u/iaynewong123/ge...3-94-98-100-84

[E92335ISG]

Originally Posted by vadonchez

to be nonest i don' think octane is the problem, it's fuel supply related,problem should be here even with stock tune.
Try 91 if you want but personnaly i will not run my motor with such fuel problem especially @high load.

Find the problem first then enjoy mhd tune.

Hey bro , ill listen to your advice and get the LPFP changed, it seems car is really not doing too well with the lpfp being in such bad condition, ill get it done asap relog the data and get back to you

[335i54n]

not sure where any listening was done, fuel issue yet Driven, let alone WOT pulls. hopefully no permanent/future issues

[vadonchez]

Originally Posted by E92335ISG

So i listened to you guys and tried V10 Stage 2 93 OCT, and things got worse, i even got a superknock DME code on cylinder 2, guys could someone take a look at this log and let me know where I have went wrong, it was a gear 4 pull to 6.4k rpm then I upshifted to 5th and continue for 2 seconds.

current mods: decatted stock downpipes, mperf exhaust non decatted, evolution race CP, forge FMIC, BMS DCI.

Additionally: Yes i do know LPFP is gonna go out soon i have a shadow code for it question i have is could this possibly be the cause of such bad logs? Or is the fuel octane that I use just not up to par? or could it be a coil pack issue? this super knock code really scared the shyt out of me and i went to stage 1+ after seeing this can anyone please advise?

ps. Car has not had a decarbon yet (will go in for it soon) , spark plugs have just been changed one step colder.

https://datazap.me/u/iaynewong123/ge...3-94-98-100-84

thats's strange, your log looks pretty good exept timing correction....
Boost,HPFP, STFT,LTFT,WGDC,MAF are good on this log.
LPFP a bit too low @high rpm but ok @ low rpm and you have timing correction@low rpm too....

your car is a DCT car right? Ask just in case you made a bad gearbox choice in MHD app...

[E92335ISG]

Originally Posted by vadonchez

thats's strange, your log looks pretty good exept timing correction....
Boost,HPFP, STFT,LTFT,WGDC,MAF are good on this log.
LPFP a bit too low @high rpm but ok @ low rpm and you have timing correction@low rpm too....

your car is a DCT car right? Ask just in case you made a bad gearbox choice in MHD app...

Hey man thanks so much , base of your feedback I changed it down to stage 1+ 91oct for a log , and lo and behold , im pretty sure its bad fuel

And yes its dct chosen in mhd , log below! Please advice!

91oct gear 4 stage 1+

[E92335ISG]

Originally Posted by 335i54n

not sure where any listening was done, fuel issue yet Driven, let alone WOT pulls. hopefully no permanent/future issues

Hey man , i just needed to find a tune that the car is able to handle for now , as the previous owner cloned the ecu i essantially cant go back to stock , and my workshop is very busy this week earliest appointment they can give me is next week so i had to do this

[vadonchez]

yes I saw it and it is a good log.

One thing stay in my mind is your first third log in 3th gear wher HPHP pressure fall to 700psi @High rpm, that was strange but no problem on your last logs.

[E92335ISG]

Originally Posted by vadonchez

yes I saw it and it is a good log.

One thing stay in my mind is your first third log in 3th gear wher HPHP pressure fall to 700psi @High rpm, that was strange but no problem on your last logs.

Me and my tuner are puzzled as well i cant figure why some parameters behave so weirdly, i can only change the LPFP out next week and see how it goes it may be a combination of bad fuel batch + lpfp.

Could also be the fact that i have burbles enabled , walnut blast hasnt been done and in my country its really hot and humid 24/7 so iat may not be ideal compared go you guys countries , which all stacked against me when i ran a more aggresive tune


But once again just wanna thank you so much for advising me on the logs , really gave me a better idea as to what i should try to get the car to not be at danger levels before i can get the stuff changed next week

[vadonchez]

you're welcome!
that's the purpose of a forum even if I'm not an expert i try to help when i can.
let us know if lpfp changing will help .

[ashaw87]

New n54 owner in need of some help.

I recently bought a manual e92 335i (n54) which has catless DP's and a stage 2 map (custom map). The car smokes when coming to a stop so thought I would try and run some logs to see how the turbos are performing.

I flashed MHD and put on the stage 0 map with a few options (burble, launch control etc).

I've logged a 3rd gear wot pull from 2k rpm:

https://datazap.me/u/ashaw87/log-171...og=0&data=3-20

Shortly after I got an eml on the dash and reduced power, so I did a short pull:

https://datazap.me/u/ashaw87/log-171...og=0&data=3-20

and read the codes (attached).

From what I can see the boost is exceeding the target, is that whatbis throwing the codes? If I turn the car off and on again it runs as normal.

Prior to flashing MHD the car would often be down on power after a hard pull but never gave an eml on the dash.

Thoughts?

[335i54n]

^check/replace your boost solenoids


once you see low fuel pressure, STOP driving and fix asap but not my car and my ring lands

[LucaN54]

What u guys think is the log ok? i think my bank 1 injectors are gone, they need to long to reach 234..

https://datazap.me/u/lucan54/new-spa...og=0&data=3-21

[vadonchez]

perfect log to me.

AFR is ok, bank 1 a little bit slower to reach 234 but nothing to worry to me in that case. Mine always do the same.

[LucaN54]

Originally Posted by vadonchez

perfect log to me.

AFR is ok, bank 1 a little bit slower to reach 234 but nothing to worry to me in that case. Mine always do the same.

ok ty, but when my car warm is and i start it up again it feels like small misfires for the first 10-15sec.. i think leaky injectors

[vadonchez]

did you try to log when it happen?
If yes post the log it could help.

[LucaN54]

is it normal to be 1.4psi under target?

https://datazap.me/u/lucan54/1?log=0...23&zoom=31-107

[ashaw87]

Originally Posted by 335i54n

^check/replace your boost solenoids


once you see low fuel pressure, STOP driving and fix asap but not my car and my ring lands

Is there a reference for normal ranges for each variable so I know what low looks like?

[TiAgAu]

Originally Posted by ashaw87

Is there a reference for normal ranges for each variable so I know what low looks like?

In this guide. I dont see fuel pressure issues so no idea what log he was looking at.

[335i54n]

^fuel note was for e92 guy

Originally Posted by LucaN54

What u guys think is the log ok? i think my bank 1 injectors are gone, they need to long to reach 234..

https://datazap.me/u/lucan54/new-spa...og=0&data=3-21

why is your boost so erratic, both the target and actual. whos tune?

[LucaN54]

Originally Posted by 335i54n

^fuel note was for e92 guy




why is your boost so erratic, both the target and actual. whos tune?

just look at the beginning, i forgot to stop this log