MHD "take a look at my log" thread

BM3Rrrr · 10-02-2019, 08:35 PM

Quote:

Originally Posted by TheMidnightNarwhal

Yeah I don't get why either. Looks like not a leak. But the pull is not proper pulls from 2.5k to almost redline so hard to say.

Just looked at the logs again a bit closer, yes they aren't the best.
Third 3rd log is the one I was specifically looking at though. It takes a bit of time to build boost from when he goes WOT but eventually meets target, could be boost solenoids??

studio54 · 10-03-2019, 05:28 AM

Quote:

Originally Posted by BM3Rrrr

Just looked at the logs again a bit closer, yes they aren't the best.
Third 3rd log is the one I was specifically looking at though. It takes a bit of time to build boost from when he goes WOT but eventually meets target, could be boost solenoids??

I am not sure cause the "gear" parameter has not been ticked on his logs, but it looks like the log #3 is a 1st-2nd-3rd pull. It does not take the same rpms amount to spool and meet target depending on gear, for example in first it will take more rpm to reach target than in 3rd.

notzz just shoot a log in third, starting (WOT) from 2500 rpm, to 6500 rpm, then shift to 4th, still WOT a bit and let off.

notzz · 10-03-2019, 09:43 PM

Quote:

Originally Posted by TheMidnightNarwhal

Yeah I don't get why either. Looks like not a leak. But the pull is not proper pulls from 2.5k to almost redline so hard to say.

Quote:

Originally Posted by BM3Rrrr

Just looked at the logs again a bit closer, yes they aren't the best.
Third 3rd log is the one I was specifically looking at though. It takes a bit of time to build boost from when he goes WOT but eventually meets target, could be boost solenoids??

Quote:

Originally Posted by studio54

I am not sure cause the "gear" parameter has not been ticked on his logs, but it looks like the log #3 is a 1st-2nd-3rd pull. It does not take the same rpms amount to spool and meet target depending on gear, for example in first it will take more rpm to reach target than in 3rd.

notzz just shoot a log in third, starting (WOT) from 2500 rpm, to 6500 rpm, then shift to 4th, still WOT a bit and let off.

i did it this evening, third gear, WOT 2500rpm to 5500 rpm then shifted to 4th WOT for a bit (i was gonna do 2500 to 6500 rpm but there was a car in front of me

https://datazap.me/u/notzzz/log-1570...0&data=3-22-25
Thanks for the input guys!

studio54 · 10-04-2019, 03:04 AM

Quote:

Originally Posted by notzz

i did it this evening, third gear, WOT 2500rpm to 5500 rpm then shifted to 4th WOT for a bit (i was gonna do 2500 to 6500 rpm but there was a car in front of me

https://datazap.me/u/notzzz/log-1570...0&data=3-22-25
Thanks for the input guys!

You will wait for experts answer.

To my low skills in log read, it looks ok for me for :

- IAT rise
- Timings (timings just after shifting to 4th are normal i read somewhere)
- Spool, 500 rpms to reach target, so OK
- WGDC in the ~40 (no leak for me)
- Some throttle closures but it's exactly when you where overboosting a bit, so i believe it's the dme doing this to avoid to exceed target.

With a cold weather like that, you won't need an after market fmic to flash Stage 2+

Fallenangel123 · 10-04-2019, 04:13 AM

What is the the ideal IAT temp to aim for when running stage 2+?

studio54 · 10-04-2019, 05:01 AM

Quote:

Originally Posted by Fallenangel123

What is the the ideal IAT temp to aim for when running stage 2+?

You should never exceed 140°F IAT on any maps. I don't know if there is an ideal IAT (probably 10°F above ambient), but the cooler, the better.

notzz · 10-04-2019, 09:22 AM

Quote:

Originally Posted by studio54

You will wait for experts answer.

To my low skills in log read, it looks ok for me for :

- IAT rise
- Timings (timings just after shifting to 4th are normal i read somewhere)
- Spool, 500 rpms to reach target, so OK
- WGDC in the ~40 (no leak for me)
- Some throttle closures but it's exactly when you where overboosting a bit, so i believe it's the dme doing this to avoid to exceed target.

With a cold weather like that, you won't need an after market fmic to flash Stage 2+

Thank you! Canadian weather lol

BM3Rrrr · 10-04-2019, 06:16 PM

Quote:

Originally Posted by studio54

You should never exceed 140°F IAT on any maps. I don't know if there is an ideal IAT (probably 10°F above ambient), but the cooler, the better.

Where did you come up with that #?

MoneySB · 10-05-2019, 04:19 AM

Wassup folks, I’ve been getting this code on and off for a while now, I’ve searched everywhere and can’t find a straight answer on how to fix it.

It started after I flashed stage 2+, the car would crank and fire up then die a second later. I’ve had to tap the gas a few times to keep the car alive. It runs rough on idle and shakes plus the AFR bounces between 14-15 while that happens, I’m thinking it’s a vacuum leak but don’t know where to start.

Also when I’m coming to a stop the RPMs will drop to 500 sometimes even 400 then the car will react to it and bring it back to 600. I’m stumped because it throws 0 codes other than those 2. I do hear the turbo spooling and air whistling when getting on the gas. I’ve since flashed back to stock and it doesn’t die at startup anymore. Any help would be appreciated.

Heres a datalog when I got on the highway after the failed cold starts: https://datazap.me/u/mannie92/4th-ge...22-23-24-25-26

studio54 · 10-05-2019, 06:34 AM

Quote:

Originally Posted by BM3Rrrr

Where did you come up with that #?

From a MHD private message, and i also read it on forums (you can google "n54 max iat"). On timing tables, timings are pulled from 140°F IAT.

BM3Rrrr · 10-05-2019, 03:43 PM

Quote:

Originally Posted by studio54

From a MHD private message, and i also read it on forums (you can google "n54 max iat"). On timing tables, timings are pulled from 140°F IAT.

DTOAST3 · 10-05-2019, 04:30 PM

Finally got my MHD stuff going. I have been getting a 29E0, 29E1 code. Car is a 2008 335i n54, bone stock except for the BMS dual cone intake. I just replaced the bank 1 o2, spark plugs and i swapped the coils for bank 1 and 2. I have also performed the smoke test. I am super new to datalogging so please let me know what sticks out or if i didn't log something that was needed. Thanks!

Idle: https://datazap.me/u/bigj/log-157030...og=0&data=3-25

3rd gear run: https://datazap.me/u/bigj/log-157030...og=0&data=3-25

BM3Rrrr · 10-06-2019, 04:31 AM

Quote:

Originally Posted by DTOAST3

Finally got my MHD stuff going. I have been getting a 29E0, 29E1 code. Car is a 2008 335i n54, bone stock except for the BMS dual cone intake. I just replaced the bank 1 o2, spark plugs and i swapped the coils for bank 1 and 2. I have also performed the smoke test. I am super new to datalogging so please let me know what sticks out or if i didn't log something that was needed. Thanks!

Idle: https://datazap.me/u/bigj/log-157030...og=0&data=3-25

3rd gear run: https://datazap.me/u/bigj/log-157030...og=0&data=3-25

Your STFT's are pretty high indicating lean conditions. You could have a vacuum leak somewhere

DTOAST3 · 10-06-2019, 09:01 AM

Thanks. I already did the white smoke test. I guess I’ll do it one more time.

DTOAST3 · 10-06-2019, 12:00 PM

Just refilled the smoke machine and now I have smoke rolling from the boost solenoid. It doesn’t look like a hose is leaking so maybe the solenoid is bad.

BM3Rrrr · 10-06-2019, 02:15 PM

Quote:

Originally Posted by DTOAST3

Thanks. I already did the white smoke test. I guess I’ll do it one more time.

Smoke tests don't always work when the vacuum leak is small.
Have you replaced all your vacuum lines with new ones?
If not I would suggest you do so.

Faulty boost solenoids will not cause high fuel trims

DTOAST3 · 10-06-2019, 02:21 PM

About half of the lines were replaced by the dealer. I'll finish up the last of them. I went to the store but they didn't have any 3.5mm so i will order some.

Here is the Boost solenoid. I'm pretty sure it should not be leaking from the black square piece since the other solenoid was not leaking at all.

BM3Rrrr · 10-06-2019, 03:36 PM

Quote:

Originally Posted by DTOAST3

About half of the lines were replaced by the dealer. I'll finish up the last of them. I went to the store but they didn't have any 3.5mm so i will order some.

Here is the Boost solenoid. I'm pretty sure it should not be leaking from the black square piece since the other solenoid was not leaking at all.

Your right it should not be leaking like that, just replace both of them it and re-log

DTOAST3 · 10-06-2019, 03:50 PM

Thanks for the input. I made another pass just now because i changed some of the items being logged.

https://datazap.me/u/bigj/10619-3rd-...og=0&data=3-24

BM3Rrrr · 10-06-2019, 04:18 PM

Quote:

Originally Posted by DTOAST3

Thanks for the input. I made another pass just now because i changed some of the items being logged.

https://datazap.me/u/bigj/10619-3rd-...og=0&data=3-24

Your still running slightly lean but it looks better, what changes did you make?

Also make sure to log WGDC

DTOAST3 · 10-06-2019, 04:20 PM

Quote:

Originally Posted by BM3Rrrr

Your still running slightly lean but it looks better, what changes did you make?

No changes to the car. I just changed some of the items being monitored in MHD. I'll grab the boost solenoids and vacuum hose because i am pretty sure they shouldn't be losing air like the video shows.

Russ335i · 10-06-2019, 06:29 PM

If one of you whiz kids don't mind looking at my log I'd much appreciate it. Car is a 2010 535i, AT. Thanks

https://datazap.me/u/russ535i/log-15...-22&zoom=0-161

10-04-2019, 04:13 AM	#3239
Fallenangel123 Private First Class 25 Rep 100 Posts Drives: Z4 35is DCT Join Date: Oct 2017 Location: UK iTrader: (0)	What is the the ideal IAT temp to aim for when running stage 2+?
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10-05-2019, 04:19 AM	#3243
MoneySB New Member 1 Rep 6 Posts Drives: 2011 335i xDrive N55 Join Date: Oct 2018 Location: Caledon, ON iTrader: (0)	Car dying 1 second after cold start, MHD stage 2 N55 Wassup folks, I’ve been getting this code on and off for a while now, I’ve searched everywhere and can’t find a straight answer on how to fix it. It started after I flashed stage 2+, the car would crank and fire up then die a second later. I’ve had to tap the gas a few times to keep the car alive. It runs rough on idle and shakes plus the AFR bounces between 14-15 while that happens, I’m thinking it’s a vacuum leak but don’t know where to start. Also when I’m coming to a stop the RPMs will drop to 500 sometimes even 400 then the car will react to it and bring it back to 600. I’m stumped because it throws 0 codes other than those 2. I do hear the turbo spooling and air whistling when getting on the gas. I’ve since flashed back to stock and it doesn’t die at startup anymore. Any help would be appreciated. Heres a datalog when I got on the highway after the failed cold starts: https://datazap.me/u/mannie92/4th-ge...22-23-24-25-26
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10-05-2019, 04:30 PM	#3246
DTOAST3 Private First Class 13 Rep 161 Posts Drives: 2008 335i Join Date: Mar 2019 Location: Memphis iTrader: (0)	Finally got my MHD stuff going. I have been getting a 29E0, 29E1 code. Car is a 2008 335i n54, bone stock except for the BMS dual cone intake. I just replaced the bank 1 o2, spark plugs and i swapped the coils for bank 1 and 2. I have also performed the smoke test. I am super new to datalogging so please let me know what sticks out or if i didn't log something that was needed. Thanks! Idle: https://datazap.me/u/bigj/log-157030...og=0&data=3-25 3rd gear run: https://datazap.me/u/bigj/log-157030...og=0&data=3-25 Last edited by DTOAST3; 10-06-2019 at 12:31 AM..
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10-06-2019, 09:01 AM	#3248
DTOAST3 Private First Class 13 Rep 161 Posts Drives: 2008 335i Join Date: Mar 2019 Location: Memphis iTrader: (0)	Thanks. I already did the white smoke test. I guess I’ll do it one more time.
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10-06-2019, 12:00 PM	#3249
DTOAST3 Private First Class 13 Rep 161 Posts Drives: 2008 335i Join Date: Mar 2019 Location: Memphis iTrader: (0)	Just refilled the smoke machine and now I have smoke rolling from the boost solenoid. It doesn’t look like a hose is leaking so maybe the solenoid is bad. Last edited by DTOAST3; 10-06-2019 at 01:41 PM..
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10-06-2019, 02:21 PM	#3251
DTOAST3 Private First Class 13 Rep 161 Posts Drives: 2008 335i Join Date: Mar 2019 Location: Memphis iTrader: (0)	About half of the lines were replaced by the dealer. I'll finish up the last of them. I went to the store but they didn't have any 3.5mm so i will order some. Here is the Boost solenoid. I'm pretty sure it should not be leaking from the black square piece since the other solenoid was not leaking at all.
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10-06-2019, 03:50 PM	#3253
DTOAST3 Private First Class 13 Rep 161 Posts Drives: 2008 335i Join Date: Mar 2019 Location: Memphis iTrader: (0)	Thanks for the input. I made another pass just now because i changed some of the items being logged. https://datazap.me/u/bigj/10619-3rd-...og=0&data=3-24
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10-06-2019, 06:29 PM	#3256
Russ335i New Member 2 Rep 11 Posts Drives: 2010 535i Join Date: Jun 2019 Location: Georgia iTrader: (0)	If one of you whiz kids don't mind looking at my log I'd much appreciate it. Car is a 2010 535i, AT. Thanks https://datazap.me/u/russ535i/log-15...-22&zoom=0-161
	Appreciate 0 Quote