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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > MHD N55 E-Series - general discussion



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      02-25-2019, 09:54 PM   #7327
TheGoodTheBadTheUgly
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Quote:
Originally Posted by xavier1228 View Post
There is a way to downgrade the app version if you uninstall the app you go to the website a Apkpure.com search for and 55 MHD flasher then it should tell you what's the current version below that you can actually downgrade to a previous version of MHD
Right I was considering an APK mirror just didn't know there was actually one for MHD! Thanks!
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      02-25-2019, 09:56 PM   #7328
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Quote:
Originally Posted by xavier1228 View Post
There is a way to downgrade the app version if you uninstall the app you go to the website a Apkpure.com search for and 55 MHD flasher then it should tell you what's the current version below that you can actually downgrade to a previous version of MHD
Right I was considering an APK mirror just didn't know there was actually one for MHD! Thanks!
Sure no problem I did it today earlier downgraded and flashed a car no issues
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      02-26-2019, 07:38 AM   #7329
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Can I have a bad injector without misfire being picked up?
Yes absolutely. They need to get pretty bad before they start to cause misfires (from my personal experience).

I've basically replaced 1 injector per month the past few months. Currently have 3 new ones in an 3 "refurbished" ones to try to save some money. First injector I was getting a really funky idle for a few weeks. Then it started smoking a bit and I was assuming all sorts of bad things... then I got a few misfires at part throttle. The other injectors that have failed never got to that point because I was not watching everything daily...

First thing I did was grab some logs of off-throttle.Drive to about 4000rpms and then just roll until AFR settles to 235. It just happen pretty quick and shouldn't bounce around at all.

This isn't a perfect test but it's worked for me. AFR issue was the first clue. Then I pulled plugs and would find 1 plug black. Replace injector. A few weeks later same shit... see AFR not settling back to 235... pull plugs and find a different one is black/wet.

I am not saying this is your issue at all. Just trying to help lol.

I also notice an rpm dip when rolling to stop signs off a cold start. Like the car wants to stall. I am not using the OTS map though I have a custom tune. These cars seem finicky with this area of the tuning and idle surging has been an issue on stock cars even.
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      02-26-2019, 09:07 AM   #7330
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Quote:
Originally Posted by bbnks2 View Post
Yes absolutely. They need to get pretty bad before they start to cause misfires (from my personal experience).

I've basically replaced 1 injector per month the past few months. Currently have 3 new ones in an 3 "refurbished" ones to try to save some money. First injector I was getting a really funky idle for a few weeks. Then it started smoking a bit and I was assuming all sorts of bad things... then I got a few misfires at part throttle. The other injectors that have failed never got to that point because I was not watching everything daily...

First thing I did was grab some logs of off-throttle.Drive to about 4000rpms and then just roll until AFR settles to 235. It just happen pretty quick and shouldn't bounce around at all.

This isn't a perfect test but it's worked for me. AFR issue was the first clue. Then I pulled plugs and would find 1 plug black. Replace injector. A few weeks later same shit... see AFR not settling back to 235... pull plugs and find a different one is black/wet.

I am not saying this is your issue at all. Just trying to help lol.

I also notice an rpm dip when rolling to stop signs off a cold start. Like the car wants to stall. I am not using the OTS map though I have a custom tune. These cars seem finicky with this area of the tuning and idle surging has been an issue on stock cars even.
Hmm ok I see. I tried to analyse my log myself with my little knowledge and the only thing I found was that while firing up the engine had an AFR of 40 wich then settled back to arround 14 a second later. Is it normal to have a spike like this at startup?
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      02-26-2019, 09:19 AM   #7331
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Quote:
Originally Posted by rborane View Post
Zero issues over here since flashing the new maps. In fact, it is quite a bit smoother.
Agreed. No problems here either. Rock solid idle. No problems on startup. Roll on throttle seems stronger (esp in higher gears, MT).

Also in OC. Maybe weather has something to do with some of the issues people have reported.
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      02-26-2019, 09:47 AM   #7332
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Hmm ok I see. I tried to analyse my log myself with my little knowledge and the only thing I found was that while firing up the engine had an AFR of 40 wich then settled back to arround 14 a second later. Is it normal to have a spike like this at startup?
Why not try doing what I posted lol?
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      02-26-2019, 10:49 AM   #7333
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Quote:
Originally Posted by bbnks2 View Post
Why not try doing what I posted lol?
Will do don't worry hahah just need to find the time for it.

For the moment, Twisted Tuning, I just logged another startup and DME managed too pickup 1 Shadow Code.

Code is: 22D0 - Valvetronic System: Control deviation warning threshold exceeded.

Should I do reset adaptations?

https://datazap.me/u/thegoodthebadth...og=0&data=4-20

I have no clue how to insert an image here but here is what the error looks like.
https://drive.google.com/open?id=1Ed...g5qaIE0eSRmLW0

Last edited by TheGoodTheBadTheUgly; 02-26-2019 at 11:26 AM..
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      02-26-2019, 12:40 PM   #7334
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So here's my log
https://datazap.me/u/iftekar/mhd-154?log=0&data=3-16

After reading few posts, I reset the adaptation for all the parameters and today it started pretty good. Will monitor for few more days.
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      02-26-2019, 12:41 PM   #7335
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Forgive me if this is a dumb question but where do I go to reset adaptions?
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      02-26-2019, 12:56 PM   #7336
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Quote:
Originally Posted by Iftekar View Post
So here's my log
https://datazap.me/u/iftekar/mhd-154?log=0&data=3-16

After reading few posts, I reset the adaptation for all the parameters and today it started pretty good. Will monitor for few more days.
Wow ok might just do that! How does it work, you just put ignition on and press adaptation reset in the MHD app?
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      02-26-2019, 01:01 PM   #7337
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Wow ok might just do that! How does it work, you just put ignition on and press adaptation reset in the MHD app?
Yes,ignition on and reset adaptations. Shut off the car completely for 30 secs and then restart.
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      02-26-2019, 02:00 PM   #7338
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been about a week since I flashed to the current version and the car is noticeably smoother and more refined across the board in terms of idle and acceleration/deceleration. No issues with cold start.

2011 N55 bone stock with MHD Stage 1

Appreciate the continued updates!
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      02-26-2019, 07:07 PM   #7339
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Hey guys, I was able to catch (i think) the rising idle in logs. Can anyone make anything of these idle logs? I didn't press the gas at all before or during the idle rise. These occurred after coming to a stop at a light.

https://datazap.me/u/porschet/log-15...og=0&data=4-19

https://datazap.me/u/porschet/log-15...og=1&data=4-19
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      02-26-2019, 08:22 PM   #7340
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Quote:
Originally Posted by FireBlaze View Post
Hey guys, I was able to catch (i think) the rising idle in logs. Can anyone make anything of these idle logs? I didn't press the gas at all before or during the idle rise. These occurred after coming to a stop at a light.

https://datazap.me/u/porschet/log-15...og=0&data=4-19

https://datazap.me/u/porschet/log-15...og=1&data=4-19
Im glad im not the only one seeing this issue. I was on stage 1 91ACN. Resetting adaptions didnt do much. Oddly enough i reflashee but went for stage 1+ 91 acn and the tune feels more stable qnd the idle jump doesnt seem as bad. Idk im completely stock besides vrsf charge pipe and afe dry drop in filter. Not sure if its a good idea running stage 1 +.
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      02-26-2019, 11:29 PM   #7341
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Would you get more Hp having JB4 with MHD bef or just JB4?
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      02-26-2019, 11:37 PM   #7342
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Quote:
Originally Posted by redwildcat17 View Post
Forgive me if this is a dumb question but where do I go to reset adaptions?
Under the CODES tab, 2nd button.
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      02-27-2019, 08:37 AM   #7343
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Quote:
Originally Posted by MartinWake View Post
Would you get more Hp having JB4 with MHD bef or just JB4?
Jb4 with backend flash would be faster than just jb4, but Mhd is faster than jb4 with bef
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      02-27-2019, 09:32 AM   #7344
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Quote:
Originally Posted by FireBlaze View Post
Hey guys, I was able to catch (i think) the rising idle in logs. Can anyone make anything of these idle logs? I didn't press the gas at all before or during the idle rise. These occurred after coming to a stop at a light.

https://datazap.me/u/porschet/log-15...og=0&data=4-19

https://datazap.me/u/porschet/log-15...og=1&data=4-19
I experienced this with the previous map, stage 1 ACN. I reflashed to the current map and have not experienced the issue again.
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      02-27-2019, 11:35 AM   #7345
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Quote:
Originally Posted by E92n55slo View Post
Quote:
Originally Posted by MartinWake View Post
Would you get more Hp having JB4 with MHD bef or just JB4?
Jb4 with backend flash would be faster than just jb4, but Mhd is faster than jb4 with bef
False. I've had every setup possible.. JB4+BEF is by far the fastest but the most inconsistent. Some days I'd be pulling 2-3 cars on a F80 M3 and other days it was door to door.
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      02-27-2019, 12:15 PM   #7346
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Quote:
Originally Posted by E92n55slo View Post
Jb4 with backend flash would be faster than just jb4, but Mhd is faster than jb4 with bef
Quote:
Originally Posted by WeekendWarriorz View Post
False. I've had every setup possible.. JB4+BEF is by far the fastest but the most inconsistent. Some days I'd be pulling 2-3 cars on a F80 M3 and other days it was door to door.
Yeah thats what I would think that jb4 plus bef would be the fastest since its best of both worlds
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      02-27-2019, 12:25 PM   #7347
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Quote:
Originally Posted by MartinWake View Post
Yeah thats what I would think that jb4 plus bef would be the fastest since its best of both worlds
Just a thought but if you have JB4 already, the investment to try a MHD BEF is minimal. If you have nothing, doesn't seem like a good investment to buy JB4, hook it all up, just to run a BEF from another provider. Like i said, just my opinion...
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      02-27-2019, 12:26 PM   #7348
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Quote:
Originally Posted by MartinWake View Post
Yeah thats what I would think that jb4 plus bef would be the fastest since its best of both worlds
Unless you just want to spend more money and add additional failure points on your car, there is absolutely no reason to run a JB4. Maybe if you want to control meth or port injection, but there are plenty of other options to control that.

A properly tuned car will be fast. You do not need a JB4 to get to a properly tuned car, so why would anyone think having one will equate to a faster car I do not understand. You need a good tuner and tune.
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