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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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      04-10-2022, 11:10 AM   #5413
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Quote:
Originally Posted by mattypp View Post
Thank you!!! I plan on getting a FMIC in the next round of mods.
No worries mate.

Good idea to do plugs and coils if you haven't done them recently.

Your timing corrections are probably caused by the rapidly rising IAT's though.
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      04-10-2022, 10:48 PM   #5414
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Could someone possibly take a look at my datalog and see if there's anything up with it because I'm trying to diagnose an issue where I get this little exhaust stumble/quiet pop on idle. I'm thinking its my HPFP on its way because I have 2 shadow codes and their 2FCA and 2FDA but I just wants someone's opinion on what they think.

Datalog: https://datazap.me/u/cyless335xi/dat...0&data=3-21-22

Thanks.
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      04-11-2022, 08:25 PM   #5415
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My first try doing a log with MHD. Just flashed the first custom tune profile. Sent the log to Wedge. Not sure what I'm looking at and if it's good or bad. . Lol
Car runs great and felt good on the pull. Anybody see anything wrong?

https://datazap.me/u/jmadams/log-164...og=0&data=3-21

Last edited by jadams161; 04-11-2022 at 08:33 PM..
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      04-11-2022, 11:31 PM   #5416
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Quote:
Originally Posted by Cyless View Post
Could someone possibly take a look at my datalog and see if there's anything up with it because I'm trying to diagnose an issue where I get this little exhaust stumble/quiet pop on idle. I'm thinking its my HPFP on its way because I have 2 shadow codes and their 2FCA and 2FDA but I just wants someone's opinion on what they think.

Datalog: https://datazap.me/u/cyless335xi/dat...0&data=3-21-22

Thanks.
Strange Your log shows map "unknown"

Have you tried flashing Stage 0 tune (this is the stock tune with MHD installed)?
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      04-11-2022, 11:35 PM   #5417
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Quote:
Originally Posted by jadams161 View Post
My first try doing a log with MHD. Just flashed the first custom tune profile. Sent the log to Wedge. Not sure what I'm looking at and if it's good or bad. . Lol
Car runs great and felt good on the pull. Anybody see anything wrong?

https://datazap.me/u/jmadams/log-164...og=0&data=3-21
Looks ok apart from a lot of timing corrections, but the base map is never meant to be perfect anyway, mine had a lot of timing corrections but after a couple of revisions had 1 or 2 minor corrections. You should see a significant difference after a couple of revisions.

I'm assuming you already changed plugs and coils recently before the tune.
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      04-12-2022, 04:09 AM   #5418
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Hello, could someone take a look at my logs and maybe figure out why i have such low boost? could it be a boost solenoid? thanks in advance https://datazap.me/u/kontonamn/335xi...=0&data=3-4-24
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      04-12-2022, 07:29 AM   #5419
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Quote:
Originally Posted by Saif2018 View Post
Looks ok apart from a lot of timing corrections, but the base map is never meant to be perfect anyway, mine had a lot of timing corrections but after a couple of revisions had 1 or 2 minor corrections. You should see a significant difference after a couple of revisions.

I'm assuming you already changed plugs and coils recently before the tune.
OK. Yes I sent the log in for first revision. I am FBO will all maintenance done. I will be installing a Tial bov this week and removing the stock diverters.
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      04-12-2022, 08:03 AM   #5420
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Originally Posted by jadams161 View Post
OK. Yes I sent the log in for first revision. I am FBO will all maintenance done. I will be installing a Tial bov this week and removing the stock diverters.
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      04-12-2022, 08:21 PM   #5421
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Quote:
Originally Posted by Saif2018 View Post
Strange Your log shows map "unknown"

Have you tried flashing Stage 0 tune (this is the stock tune with MHD installed)?
I have not tried doing that, should I?
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      04-12-2022, 10:40 PM   #5422
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Quote:
Originally Posted by Cyless View Post
I have not tried doing that, should I?
If you don't have any map packs (only the MHD flasher) then flash stage 0, clear codes and relog. Otherwise flash Stage 1 V9 or V10 at least then relog,

Do an Idle log, and a 3rd gear log.

At WOT your HPFP didn't drop below 1500psi, so it seems ok on that "unknown" map.

At idle your HPFP should settle to around 700 psi (after the cold start is finished)

Last edited by Saif2018; 04-12-2022 at 10:51 PM..
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      04-15-2022, 06:20 AM   #5423
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If anyone could take a look at this log I’d appreciate it. Seems I’m chasing a boost leak but maybe I’m missing something. 2011 e90 n55. Mhd stage 1 with a Cobb charge pipe. Thanks!

https://datazap.me/u/toconnell25/log...=0&data=3-4-18
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      04-15-2022, 09:27 AM   #5424
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Quote:
Originally Posted by Saif2018 View Post
Just curious what all the timing corrections do to the engine?
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      04-15-2022, 10:05 AM   #5425
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Quote:
Originally Posted by jadams161 View Post
Just curious what all the timing corrections do to the engine?
Usually base maps have a quite a few timing corrections, at least mine did. cleaned up after a few revisions.

Typically timing corrections can be caused by plugs/coils/poor fuel quality/rapidly rising IAT's etc.

Have you changed plugs and coils recently?
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      04-15-2022, 12:43 PM   #5426
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Quote:
Originally Posted by Saif2018 View Post
Usually base maps have a quite a few timing corrections, at least mine did. cleaned up after a few revisions.

Typically timing corrections can be caused by plugs/coils/poor fuel quality/rapidly rising IAT's etc.

Have you changed plugs and coils recently?
Yes all changed. Eldor and NGK Iridium.
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      04-15-2022, 01:25 PM   #5427
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Quote:
Originally Posted by jadams161 View Post
Yes all changed. Eldor and NGK Iridium.
I wouldn't worry about it at the moment, go through a few revisions first, if they don't improve, then add E85 and see if it clears, if it does then it's probably fuel quality.
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      04-16-2022, 12:28 AM   #5428
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Hi guys please assist anyway you can, stationary revs at 1.8-2k oscillating arrrggg!! Tried resetting the adaptations, etc idk what it could be is there a sensor out?

Its running the
3.5bar map, 17t turbos, Inlets, outlets, cp, fmic, index12s, etc

I cant pick whats causing it on the log

https://datazap.me/u/r33sk8ftw/oscil...?log=0&data=16
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      04-16-2022, 01:40 AM   #5429
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Quote:
Originally Posted by xm4tr1x View Post
Hi guys please assist anyway you can, stationary revs at 1.8-2k oscillating arrrggg!! Tried resetting the adaptations, etc idk what it could be is there a sensor out?

Its running the
3.5bar map, 17t turbos, Inlets, outlets, cp, fmic, index12s, etc

I cant pick whats causing it on the log

https://datazap.me/u/r33sk8ftw/oscil...?log=0&data=16
some throttle oscillation when trying to hold revs at certain rpm is normal in my opinion.

How is your idle?

Any 3rd gear logs?
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      04-16-2022, 02:45 PM   #5430
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Quote:
Originally Posted by xm4tr1x View Post
Hi guys please assist anyway you can, stationary revs at 1.8-2k oscillating arrrggg!! Tried resetting the adaptations, etc idk what it could be is there a sensor out?

Its running the
3.5bar map, 17t turbos, Inlets, outlets, cp, fmic, index12s, etc

I cant pick whats causing it on the log

https://datazap.me/u/r33sk8ftw/oscil...?log=0&data=16
It's caused by being catless. That's the O2 sensor diagnostic doesn't complete becuase it expects to see a change in reading between the up and downstream sensors. You can see the AFR readings bouncing along with the throttle and timing.

It's not normal and you can fix this with a custom tune.
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      04-16-2022, 10:31 PM   #5431
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Quote:
Originally Posted by CarAbuser View Post
It's caused by being catless. That's the O2 sensor diagnostic doesn't complete becuase it expects to see a change in reading between the up and downstream sensors. You can see the AFR readings bouncing along with the throttle and timing.

It's not normal and you can fix this with a custom tune.
Can you explain why a catted car the rpms would have minor fluctuations whilst stationery, if you revved up trying to hold a steady 2k for example?

Last edited by Saif2018; 04-17-2022 at 01:31 AM..
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      04-16-2022, 10:31 PM   #5432
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Quote:
Originally Posted by CarAbuser View Post
It's caused by being catless. That's the O2 sensor diagnostic doesn't complete becuase it expects to see a change in reading between the up and downstream sensors. You can see the AFR readings bouncing along with the throttle and timing.

It's not normal and you can fix this with a custom tune.
Man i thought as much I raised it with Ken Atkinson when he custom tuned it
Mayb he missed that rev range idk
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      04-16-2022, 10:33 PM   #5433
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Quote:
Originally Posted by Saif2018 View Post
some throttle oscillation when trying to hold revs at certain rpm is normal in my opinion.

How is your idle?

Any 3rd gear logs?
Hey mate it idles fine and heres 3rd gear pulls
https://datazap.me/u/r33sk8ftw/v5?log=0&data=3-22
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      04-17-2022, 01:28 AM   #5434
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Quote:
Originally Posted by xm4tr1x View Post
Hey mate it idles fine and heres 3rd gear pulls
https://datazap.me/u/r33sk8ftw/v5?log=0&data=3-22
That's not with the Hybrid turbos was it?
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