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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > MHD "take a look at my log" thread



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      01-20-2022, 06:46 PM   #5215
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Quote:
Originally Posted by Takummie View Post
https://datazap.me/u/takummie/3-pull...og=0&data=3-12
Anything seem off here? Car feels stable no codes whatsoever. Former owner placed some OKD racing coils in there and spark plug conditions are unknown. It just feels a bit slower than it should be but maybe it痴 just me. Any ideas? (I知 aware of the IAT rise and I知 getting FMIC and CP next week)
Some timing corrections on cyl. 2 and cyl. 3. The pulling of timing is your DME/ECU trying to prevent engine knock, and in turn you lose power and economy - probably contributing to the sluggishness. Actual boost is consistently under target by 2-4 psi so it's more "sluggy" than it should be. Maybe some new plugs gapped correctly will restore some life if it's been a while since replacing.
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      01-21-2022, 02:55 AM   #5216
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Quote:
Originally Posted by Takummie View Post
https://datazap.me/u/takummie/3-pull...og=0&data=3-12
Anything seem off here? Car feels stable no codes whatsoever. Former owner placed some OKD racing coils in there and spark plug conditions are unknown. It just feels a bit slower than it should be but maybe it痴 just me. Any ideas? (I知 aware of the IAT rise and I知 getting FMIC and CP next week)
It looks like you probably have some sort of a boost leak,

Good idea to follow this guide... (even if you don't have a 30FF code)

https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/
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      01-21-2022, 03:48 AM   #5217
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Quote:
Originally Posted by njang92 View Post
Some timing corrections on cyl. 2 and cyl. 3. The pulling of timing is your DME/ECU trying to prevent engine knock, and in turn you lose power and economy - probably contributing to the sluggishness. Actual boost is consistently under target by 2-4 psi so it's more "sluggy" than it should be. Maybe some new plugs gapped correctly will restore some life if it's been a while since replacing.
Thanks for looking! I値l look into it
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      01-21-2022, 03:52 AM   #5218
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Quote:
Originally Posted by Saif2018 View Post
It looks like you probably have some sort of a boost leak,

Good idea to follow this guide... (even if you don't have a 30FF code)

https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/
Thanks! Thought so but it must be minor since I still have some runs that taper off to around 10 psi. But I値l definitely take a look when installing my FMIC. I致e already changed my CP before, did all my intake gaskets and throttle body so I知 suspecting a cracked OEM FMIC.
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      01-21-2022, 07:41 PM   #5219
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Quote:
Originally Posted by Sgop335 View Post
There is a torque limiter 512 preventing any boost target. Reason why ppl and the experts should log this parameter so good thing you did.
Google torque limit 512 for possible causes and solutions or could be the map not sure
Got boost again!

Thanks to you(and Saif2018), I got this sorted.
Plugged the fan shroud in and all is good. Not having that connector connected throws that code and puts it into a type of limp mode.

So here is another log:
https://datazap.me/u/love-hatethesec...og=0&data=3-22

Why the sawtooth Throttle position and WGDC?
DTC is fully off

Also, I'm interested in saving the Dinan tune (this one) before I flash with MHD. Is that possible?
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      01-21-2022, 08:04 PM   #5220
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Quote:
Originally Posted by Love/HateTheseCars View Post
Got boost again!

Thanks to you(and Saif2018), I got this sorted.
Plugged the fan shroud in and all is good. Not having that connector connected throws that code and puts it into a type of limp mode.

So here is another log:
https://datazap.me/u/love-hatethesec...og=0&data=3-22

Why the sawtooth Throttle position and WGDC?
DTC is fully off

Also, I'm interested in saving the Dinan tune (this one) before I flash with MHD. Is that possible?
When you first go to flash MHD, it will ask/have you save your stock(or whatever's on the car now) file/tune.
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      01-21-2022, 09:18 PM   #5221
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Originally Posted by IllSic_Design View Post
When you first go to flash MHD, it will ask/have you save your stock(or whatever's on the car now) file/tune.
Got it, thanks.

Still looking for insight on the log.
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      01-22-2022, 02:57 AM   #5222
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Quote:
Originally Posted by Love/HateTheseCars View Post
Got boost again!

Thanks to you(and Saif2018), I got this sorted.
Plugged the fan shroud in and all is good. Not having that connector connected throws that code and puts it into a type of limp mode.

So here is another log:
https://datazap.me/u/love-hatethesec...og=0&data=3-22

Why the sawtooth Throttle position and WGDC?
DTC is fully off

Also, I'm interested in saving the Dinan tune (this one) before I flash with MHD. Is that possible?
No worries mate,

Throttle closures are probably your Dinan tune causing it.

Looks like it's taking a while to reach boost target, should be reaching boost target within about 500rpm.

Could just be your wastegates (which you might have to adjust the rods manually) but Flash a MHD stage 1 map and relog, hopefully that will help rule out tune related issues.
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      01-22-2022, 08:18 AM   #5223
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Quote:
Originally Posted by Saif2018 View Post
No worries mate,

Throttle closures are probably your Dinan tune causing it.

Looks like it's taking a while to reach boost target, should be reaching boost target within about 500rpm.

Could just be your wastegates (which you might have to adjust the rods manually) but Flash a MHD stage 1 map and relog, hopefully that will help rule out tune related issues.
I'll do that.
My turbos are past the point of adjustment, I'm sure. I have rebuildable OEMs that I need to work on.
Any reccomendations as to brands of rebuild kits? Perhaps even upgrade kits / parts?
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      01-22-2022, 08:48 AM   #5224
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Quote:
Originally Posted by Love/HateTheseCars View Post
I'll do that.
My turbos are past the point of adjustment, I'm sure. I have rebuildable OEMs that I need to work on.
Any reccomendations as to brands of rebuild kits? Perhaps even upgrade kits / parts?
I'd just get RB or Pure of you want reliable turbos. If you get RB's you can send your cores in and save a couple of hundred dollars, Rob also does discounts

You can email him for further info...

rob.rbturbo@gmail.com

Before you throw the turbos out though, flash a MHD and see if it makes a difference.
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      01-22-2022, 08:55 AM   #5225
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Quote:
Originally Posted by Saif2018 View Post
I'd just get RB or Pure of you want reliable turbos. If you get RB's you can send your cores in and save a couple of hundred dollars, Rob also does discounts

You can email him for further info...

rob.rbturbo@gmail.com

Before you throw the turbos out though, flash a MHD and see if it makes a difference.
Yeah, I'll do the flash first. I get the concept of resolving issues before adding new variables.
I was planning to rebuild myself. Use a Turbo lab of America kit.
Thoughts?
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      01-22-2022, 09:17 AM   #5226
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Quote:
Originally Posted by Love/HateTheseCars View Post
Yeah, I'll do the flash first. I get the concept of resolving issues before adding new variables.
I was planning to rebuild myself. Use a Turbo lab of America kit.
Thoughts?
Don't even bother touching your turbos until you rule out much cheaper and much more common issues that cause slow spool.

Replace all vacuum lines. Plenty of DIY articles here, cost is minimal and time is 1hr at most. That's by far the most common culprit.

While doing so you can check the wastegate arm movement on the rear trubo to make sure it's not obstructed by the downpipe vbands. Just manually actuate it with your fingers and make sure it moves freely without hitting anything.

If the problem is still there you should consider a boost leak. Check intercooler connections and the chargepipe. Maybe try a pressure test if you can't find anything obvious.

You can also consider new boost solenoids as they are cheap and easy to replace.
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      01-22-2022, 10:36 AM   #5227
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Quote:
Originally Posted by CarAbuser View Post
Don't even bother touching your turbos until you rule out much cheaper and much more common issues that cause slow spool.

Replace all vacuum lines. Plenty of DIY articles here, cost is minimal and time is 1hr at most. That's by far the most common culprit.

While doing so you can check the wastegate arm movement on the rear trubo to make sure it's not obstructed by the downpipe vbands. Just manually actuate it with your fingers and make sure it moves freely without hitting anything.

If the problem is still there you should consider a boost leak. Check intercooler connections and the chargepipe. Maybe try a pressure test if you can't find anything obvious.

You can also consider new boost solenoids as they are cheap and easy to replace.
+1 on everything CarAbuser said,

Turbos should be worst case last resort.
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      01-22-2022, 10:37 AM   #5228
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Quote:
Originally Posted by Love/HateTheseCars View Post
Yeah, I'll do the flash first. I get the concept of resolving issues before adding new variables.
I was planning to rebuild myself. Use a Turbo lab of America kit.
Thoughts?
I don't know anything about them to be honest.
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      01-22-2022, 11:26 AM   #5229
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So new to n54 but not to tuning. Got a 08 335xi AT and flashed mhd v10 stage 1+ 93 and xhp stage 3 to the car yesterday and went for a rip. Car is bone stock but figured could get away with 1+ due to how cold it is.

Anyway trying to figure out why the car is closing the throttle during WOT. It didnt feel like it was when driving it but all the logs i took show it.

Can timing correction cause throttle closure? I assume overboost and over load can. But why would mhd maps target load lower then what the car can make. Im just trying to understand whats going on with my throttle.

Thanks

https://datazap.me/u/djt81185/stock-...og=0&data=3-20
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      01-22-2022, 12:00 PM   #5230
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Quote:
Originally Posted by djt81185 View Post
So new to n54 but not to tuning. Got a 08 335xi AT and flashed mhd v10 stage 1+ 93 and xhp stage 3 to the car yesterday and went for a rip. Car is bone stock but figured could get away with 1+ due to how cold it is.

Anyway trying to figure out why the car is closing the throttle during WOT. It didnt feel like it was when driving it but all the logs i took show it.

Can timing correction cause throttle closure? I assume overboost and over load can. But why would mhd maps target load lower then what the car can make. Im just trying to understand whats going on with my throttle.

Thanks

https://datazap.me/u/djt81185/stock-...og=0&data=3-20
Was this straight after flashing, if I'm not mistaken adaptations need to set and it should smooth out.

Good idea to change out old plugs and coils, they can cause timing corrections,

Charge pipe upgrade also recommended.

Your IAT's spiking, so that is likely causing timing corrections up top.

Run stage 1 or upgrade FMIC.
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      01-22-2022, 01:26 PM   #5231
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My car is a FBO 335i with VTT stage 2+ turbos. Currently getting it tuned by Twisted Tuning. Can someone take a look at these logs and help me figure out why my rpms are bouncing around? I have no codes for misfires but it kind of feels like it is, that or the torque converter is going out or something. Thank you!

https://datazap.me/u/jorow99/rpm-osc...?log=0&data=22
https://datazap.me/u/jorow99/rpm-osc...?log=0&data=18
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      01-23-2022, 08:17 AM   #5232
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Quote:
Originally Posted by Saif2018 View Post
Was this straight after flashing, if I'm not mistaken adaptations need to set and it should smooth out.

Good idea to change out old plugs and coils, they can cause timing corrections,

Charge pipe upgrade also recommended.

Your IAT's spiking, so that is likely causing timing corrections up top.

Run stage 1 or upgrade FMIC.
Thanks and yes it was within an hour of flashing.

Intercooler and charge pipe already shipped and should be here shortly.

Do i need to do anything special to set adaptations or just drive it?
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      01-23-2022, 09:54 AM   #5233
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Quote:
Originally Posted by djt81185 View Post
Thanks and yes it was within an hour of flashing.

Intercooler and charge pipe already shipped and should be here shortly.

Do i need to do anything special to set adaptations or just drive it?
Just drive it for a couple of days and take it for a few rips.
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      01-23-2022, 10:21 AM   #5234
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Out of curiosity, I wanted to test the V10 Stage 2+ 93 oct.

I usually only run 91oct but left in my tank, as an octane booster, I had a kind of homemade ~E30 (91oct mixed with 96% liquid bioethanol for fireplace that I bought at the DIY store) that I just used to pass my emission test. I looked online for the octane rating, E30 should equal to 94oct.

Ran my personal best recorded 100-200 (~8.6sec) in the 4th gear log, we were 2 people in the car and had secondaries welded back, usually I'm alone for my 100-200, but in the otherhand ambient temperature was cold, so it's a big help (3-5ーC)

(And still exact same flat road)

3rd-4th gear log : https://datazap.me/u/studio54/log-16...=0&data=3-5-22
(100-200 ~8.8sec)

only 4rd gear log : https://datazap.me/u/studio54/log-16...=0&data=3-5-22
(100-200 ~8.6sec)

I had some timing corrections (more in the 3rd-4th), other values seems fine (?), but I have some lacks of understanding about "Timing Cyl Crk".

Concerning my blend, I don't recommend anyone doing this, I don't know exactly what are the 4% left in those bioethanol for fireplace bottles and if it's harmful, but it was one shot to reduce my CO at the tailpipe test.
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Last edited by studio54; 01-23-2022 at 11:20 AM..
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      01-23-2022, 12:27 PM   #5235
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Quote:
Originally Posted by studio54 View Post
Out of curiosity, I wanted to test the V10 Stage 2+ 93 oct.

I usually only run 91oct but left in my tank, as an octane booster, I had a kind of homemade ~E30 (91oct mixed with 96% liquid bioethanol for fireplace that I bought at the DIY store) that I just used to pass my emission test. I looked online for the octane rating, E30 should equal to 94oct.

Ran my personal best recorded 100-200 (~8.6sec) in the 4th gear log, we were 2 people in the car and had secondaries welded back, usually I'm alone for my 100-200, but in the otherhand ambient temperature was cold, so it's a big help (3-5ーC)

(And still exact same flat road)

3rd-4th gear log : https://datazap.me/u/studio54/log-16...=0&data=3-5-22
(100-200 ~8.8sec)

only 4rd gear log : https://datazap.me/u/studio54/log-16...=0&data=3-5-22
(100-200 ~8.6sec)

I had some timing corrections (more in the 3rd-4th), other values seems fine (?), but I have some lacks of understanding about "Timing Cyl Crk".

Concerning my blend, I don't recommend anyone doing this, I don't know exactly what are the 4% left in those bioethanol for fireplace bottles and if it's harmful, but it was one shot to reduce my CO at the tailpipe test.
Very impressive times mate,

That's actual cylinder timing which varies but upto 7.5 degrees is pretty good in my opinion.
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      01-23-2022, 12:52 PM   #5236
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Quote:
Originally Posted by Saif2018 View Post
Very impressive times mate,

That's actual cylinder timing which varies but upto 7.5 degrees is pretty good in my opinion.
Thanks Saif Very happy with those times
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