[Cyless]

For the past few weeks I've been getting a 29E0: DME mixture control code. I'm gonna need some help here because I'm not sure where to start, there's no symptoms and I've replaced alot of things that can cause the code; main things are index 12 injectors and vacuum lines but I've also replaced alot of other things like the valve cover and stuff. Like I said it just randomly kicks on and the car isn't any different. Could my LPFP be on its last leg?

Thanks,
2007 E90 BMW 335xi

[gbalthrop]

Originally Posted by Cyless

For the past few weeks I've been getting a 29E0: DME mixture control code... there's no symptoms and I've replaced alot of things... 2007 E90 BMW 335xi

What Scan Tool or Diagnostic Software do you have available? That "29E0" Hex-code is NOT specific on its own for Bank 1 TOO Lean or TOO Rich. The P-code IS specific, or Fault Details/ Freeze Frame Data would indicate LEAN/ RICH. Smoke, fuel odor, stall at idle would give clues as well, but you say NO symptoms.

A Scan Tool, or INPA/ ISTA could provide Live Data that could prevent throwing parts: Rail Pressure Sensor signal, Low Pressure Fuel Sensor, Fuel Trims, MAF Signal, etc. Your MSD80 DME can provide a LOT of data if you have the right Diagnostic Tools. Without that data, the "Parts Cannon" gets more expensive than a Laptop and/or K+DCAN Cable, and the frustration level is excessive.
George

[Cyless]

Originally Posted by gbalthrop

What Scan Tool or Diagnostic Software do you have available? That "29E0" Hex-code is NOT specific on its own for Bank 1 TOO Lean or TOO Rich. The P-code IS specific, or Fault Details/ Freeze Frame Data would indicate LEAN/ RICH. Smoke, fuel odor, stall at idle would give clues as well, but you say NO symptoms.

A Scan Tool, or INPA/ ISTA could provide Live Data that could prevent throwing parts: Rail Pressure Sensor signal, Low Pressure Fuel Sensor, Fuel Trims, MAF Signal, etc. Your MSD80 DME can provide a LOT of data if you have the right Diagnostic Tools. Without that data, the "Parts Cannon" gets more expensive than a Laptop and/or K+DCAN Cable, and the frustration level is excessive.
George

I use MHD, Carly, and INPA. I used MHD to pull the codes but I got a new laptop and I don't have INPA on it yet but yes it doesn't have any symptoms when it throws the code, it doesn't even stumble or anything on idle. I have a data log from a week or 2 ago if you want that, I could do a new one soon if you'd like too. Btw does INPA work on windows 11?

Thanks,
2007 E90 BMW 335xi

[gbalthrop]

Originally Posted by Cyless

... Btw does INPA work on windows 11? Thanks,
2007 E90 BMW 335xi

I've avoided "Upgrading" to Windows 11, as I could NOT find a clear indication of whether the free "Home" version could run in anything but "S Mode". In S Mode, you CANNOT install software from any source other than "Windows Store", as I understand it.

My Lenovo S145 which I purchased in 2019 came with Windows 10 "S Mode", but you could opt out of S Mode (which I DID), and I run both INPA & ISTA on that, along with other 3rd party software.

So Microsoft MAY have gone one step closer to trying to FORCE you to only use their software with their Operating System (Monopoly Tying). NOT much anti-trust litigation these days.

So if you can wade through the complications and TELL US what you found, and HOW you can run INPA/ ISTA on Windows 11 free Home version, please enlighten us.
George

[Cyless]

Originally Posted by gbalthrop

I've avoided "Upgrading" to Windows 11, as I could NOT find a clear indication of whether the free "Home" version could run in anything but "S Mode". In S Mode, you CANNOT install software from any source other than "Windows Store", as I understand it.

My Lenovo S145 which I purchased in 2019 came with Windows 10 "S Mode", but you could opt out of S Mode (which I DID), and I run both INPA & ISTA on that, along with other 3rd party software.

So Microsoft MAY have gone one step closer to trying to FORCE you to only use their software with their Operating System (Monopoly Tying). NOT much anti-trust litigation these days.

So if you can wade through the complications and TELL US what you found, and HOW you can run INPA/ ISTA on Windows 11 free Home version, please enlighten us.
George

Yeah when I have time I will try and get that set up but in the meantime do you want some logs?

[gbalthrop]

Originally Posted by Cyless

... in the meantime do you want some logs?

If the logs cover the time the 29E0 Fault Code was saved, then we MAY learn something, depending upon what Parameters were logged. According to this Fault Info Sheet for 29E0 from BMW Fault Code Lookup, the code would be set > 40 seconds after cold start (after Code Cleared with engine off, Ignition ON):
https://bmwfault.codes/XMLDiagView?d...EAOAAzADAANAA=
George

[Cyless]

I am very sorry for the late reply I've just been busy with work and exams but that stuff aside I have 2 logs, one is from the highway then limp mode kicked in and the other pull from the start of 3rd gear with no limp mode.

this is when limp mode kicked on when going WOT at around 70 MPH
https://datazap.me/u/cyless335xi/lim...ata=3-11-23-24

This is a pull from the start of 3rd gear from a stoplight
https://datazap.me/u/cyless335xi/3rd...g=0&data=23-24

The two codes I had when I checked them with MHD was 29F1 DME: Fuel pressure, plausibility and 29E1 DME: Mixture Control

Thanks,
2007 E90 BMW 335xi

[Wolf 335]

In my case 29E1 (P0174) was a lean mixture bank 2 and the culprit was injector number 4.

[Sgop335]

Originally Posted by Cyless

I am very sorry for the late reply I've just been busy with work and exams but that stuff aside I have 2 logs, one is from the highway then limp mode kicked in and the other pull from the start of 3rd gear with no limp mode.

this is when limp mode kicked on when going WOT at around 70 MPH
https://datazap.me/u/cyless335xi/lim...ata=3-11-23-24

This is a pull from the start of 3rd gear from a stoplight
https://datazap.me/u/cyless335xi/3rd...g=0&data=23-24

The two codes I had when I checked them with MHD was 29F1 DME: Fuel pressure, plausibility and 29E1 DME: Mixture Control

Thanks,
2007 E90 BMW 335xi

your first log shows the issue...

The rail pressure collapsed on full pedal in 4th gear and boost at 5k+ rpm
Fuel banks are running super lean, which is bad for the engine.

[Wolf 335]

Originally Posted by Sgop335

your first log shows the issue...

The rail pressure collapsed on full pedal in 4th gear and boost at 5k+ rpm
Fuel banks are running super lean, which is bad for the engine.

What are you suggesting is the culprit?

[Sgop335]

Originally Posted by Wolf 335

What are you suggesting is the culprit?

Not sure what made the rail pressure drop dramatically like that, suspect hpfp mostly or injector

[Cyless]

Originally Posted by Sgop335

Not sure what made the rail pressure drop dramatically like that, suspect hpfp mostly or injector

I just replaced all my injectors with index 12 injectors that are all new (used) ones about 2 months ago. Should I look into buying a hpfp because it seems like when the HPFP is needed the most (when I'm pushing it on the highway or similar conditions) that limp mode kicks in.

Thanks,
2007 E90 BMW 335xi

[Wolf 335]

Originally Posted by Cyless

I just replaced all my injectors with index 12 injectors that are all new (used) ones about 2 months ago. Should I look into buying a hpfp because it seems like when the HPFP is needed the most (when I'm pushing it on the highway or similar conditions) that limp mode kicks in.

Thanks,
2007 E90 BMW 335xi

Fuel pump plausability code doesn't mean your pump is bad.

Ok so, first order of business is to pull the spark plugs after car sat overnight.
Observe the plug for fuel presence/smell and the color of the tip. This will eleminate or confirm the potential of a leaking injector.
- Yes, index 12 injectors leak.

Then, if you have INPA software you can check if your High/Low fuel pump and O2 sensors function as they should.

Where did you get these (USED) index 12 injectors?

[Cyless]

Originally Posted by Wolf 335

Fuel pump plausability code doesn't mean your pump is bad.

Ok so, first order of business is to pull the spark plugs after car sat overnight.
Observe the plug for fuel presence/smell and the color of the tip. This will eleminate or confirm the potential of a leaking injector.
- Yes, index 12 injectors leak.

Then, if you have INPA software you can check if your High/Low fuel pump and O2 sensors function as they should.

Where did you get these (USED) index 12 injectors?

Okay I'll check the plugs, I'll for sure look at them on Sunday but I'm going to try to look at them sooner. I still got to download INPA on my new computer so I'll do that when I can. As for where I got the injectors from, I bought them on eBay from a seller named: specializedgerman. You can look them up if you want but they seem pretty reputable.

[gbalthrop]

Originally Posted by Sgop335

Not sure what made the rail pressure drop dramatically like that, suspect hpfp mostly or injector

Perhaps the rail pressure did NOT actually "drop dramatically like that". Perhaps the Rail Pressure Sensor signal to the DME is the issue. I don't know anything about the HPFP control system, but that is even more likely suspect.
George

[Sgop335]

Originally Posted by gbalthrop

Perhaps the rail pressure did NOT actually "drop dramatically like that". Perhaps the Rail Pressure Sensor signal to the DME is the issue. I don't know anything about the HPFP control system, but that is even more likely suspect.
George

looks like the rail pressure did drop since lambda banks are running super lean once that happens. Guess you would say all signals are an issue then

[Cyless]

Originally Posted by Sgop335

looks like the rail pressure did drop since lambda banks are running super lean once that happens. Guess you would say all signals are an issue then

So what could that mean, DME mosfets then or?

[Cyless]

I just checked my plugs and all of the spark plugs seemed okay, I mean I changed them like 2 months ago or so but they didn't smell like fuel or anything. They only had some carbon around the threads but thats it.

[Cyless]

Sorry for the very late reply but I finally set up INPA and everything so I went ahead and gathered a freeze frame of the fault code, hope fully this helps. I also took a picture of my adaptation mixtures too.

Sorry for the bad quality, I'm not sure why but when I uploaded them they got blurry.

View post on imgur.com

View post on imgur.com

[Wolf 335]

Originally Posted by Cyless

Sorry for the very late reply but I finally set up INPA and everything so I went ahead and gathered a freeze frame of the fault code, hope fully this helps. I also took a picture of my adaptation mixtures too.

Sorry for the bad quality, I'm not sure why but when I uploaded them they got blurry.

View post on imgur.com

View post on imgur.com

Second image that shows oxygen sensors, how long was the car running for?

O2 sensors need to be read when engine is warmed up. Also capture the screen while youre pressing the acceperator (in P) and see whats happening to those values.

[Cyless]

Originally Posted by Wolf 335

Second image that shows oxygen sensors, how long was the car running for?

O2 sensors need to be read when engine is warmed up. Also capture the screen while youre pressing the acceperator (in P) and see whats happening to those values.

The car wasn't running for that long, maybe 3 or more minutes. I'm not entirely sure what you mean by (in P) but for now I will send you a picture of the values when I press the accelerator and see what happens. If thats what you mean.

Thanks,
2007 E90 BMW 335xi

[Cyless]

So should I be looking into a HPFP or High Pressure sensor? Or maybe some 02s?