Car barely running all of a sudden- HPFP or something else?

Boland01 · 03-14-2016, 07:02 PM

My son's 2007 335i was running fine until the other night. All of a sudden it's barely idling, has no power, running very rough and we have the half engine light and a variety of others on the dash.

He just hooked up his laptop and got the following messages though his JB4:
30BB- DME failure
2D60- Fuel mass, monitoring
2C3C- lamda probe in cat
29D2- misfire cylinder 6
29DD- misfire cylinder 4
29CC- misfire multiple cylinders
2AAF- fuel pump plausibility
2AAE - Fuel pump
2C78- Lambda probe behind cat #2

The low pressure fuel pump is new so I doubt it's that. Could it be the high pressure fuel pump going out? He's got just over 80K so I hope the high pressure fuel pump would be covered if that is it. Other than having it towed it's not driveable to the dealership. It also has a JB4, VRSF Catless downpipes and a CRX FMIC. Would the dealership deny a warranty claim because of this? Can we take to it to our independent garage I trust instead?

Sorry for all the questions, with his mods I want to tread carefully here.

Rosetta Stoned · 03-14-2016, 07:27 PM

I'd think DME failure is the main cause from looking at those codes but I'm no expert.

Boland01 · 03-14-2016, 07:43 PM

Hope not. I would think it might not even start if that was the case. Hopefully, someone else who has had a similar issue can advise.

Tsujen · 03-14-2016, 07:52 PM

If anything take the jb4 out before going to the dealership. Worth the 30-60 minutes for thousand of dollars paying out of warranty.

Never know it can help. Clear codes, map 0 than uninstall.

I just took mine to the dealership with a fmic but took out the jb4 and they didn't say anything about that.

Sounds like hpfp though from what you're describing, mine went out and had the same problems (idle and such)

Boland01 · 03-14-2016, 08:05 PM

Can an independent fix the HPFP under warranty? There is a person I trust right up the road. The Stealership will require a tow and I don't trust them.

Game · 03-14-2016, 08:11 PM

Sounds like the dreaded DME failure.

http://www.e90post.com/forums/showthread.php?t=734162

Luckily, it could be a fairly cheap fix.

Dealership won't honor your warranty with the JB4 as the issue is related to the DME. Take a look at the link above and proceed what best suits you. Personally, I'd buy the new mosfets myself and have someone local solder them on.

Boland01 · 03-14-2016, 08:26 PM

Will do - thank you!

Tsujen · 03-14-2016, 08:39 PM

Quote:

Originally Posted by Boland01

Can an independent fix the HPFP under warranty? There is a person I trust right up the road. The Stealership will require a tow and I don't trust them.

Yeah they can, I had mine done at an Indy shop and warranty still covered it.

Cory S · 03-15-2016, 01:06 PM

HPFP..... The first code triggered was probably the 2C78 and 2AAE

Blowout81 · 03-15-2016, 04:12 PM

DME failure which then fried 2 engine coils (hence the misfire), and possibly 2 spark plugs. Link listed above is a great help. Relatively easy enough fix. Will save u $$$$$$

muncie21 · 03-15-2016, 05:50 PM

Check the plugs and go from there.
I 'believe' that a failed Mosfet will result in a non-working injector (e.g. closed all the time) if so, wet plugs would indicate an injector issue, rather than a DME/mosfet issue.

ritzzzzzwik · 03-19-2016, 12:03 AM

DME. If you have warranty get it replaced. If not, get the defective mosfets replaced on the DME. Also be sure to change the Spark Plugs, Coils, and Injectors. You could just do the mosfets and give it a shot, but most likely the the injectors have been damaged too, along with the coils. How do I know- happened to me

muncie21 · 03-20-2016, 07:41 AM

OP, any updates?

Boland01 · 03-20-2016, 08:06 AM

Got the mosfets ordered, they will be here on Monday. I already pulled the DME so now it's just a matter of desoldering the old and soldering in the new mosfets. After that we'll see if that takes care of the problem or not. I ended up ordering extra's because they are so cheap.

Boland01 · 03-22-2016, 08:01 AM

The mosfets arrived last night. After my son looked at the board and started to desolder one he decided it was best to have it sent out as his solder iron did not have an adjustable temperature capability. There is a person local in Houston we found on ebay. Sending it out today to him.

03-14-2016, 07:02 PM	#1
Boland01 Lieutenant 151 Rep 460 Posts Drives: 2010 535ix, 2008, 2007 335i Join Date: Sep 2013 Location: Magnolia, TX iTrader: (0)	Car barely running all of a sudden- HPFP or something else? My son's 2007 335i was running fine until the other night. All of a sudden it's barely idling, has no power, running very rough and we have the half engine light and a variety of others on the dash. He just hooked up his laptop and got the following messages though his JB4: 30BB- DME failure 2D60- Fuel mass, monitoring 2C3C- lamda probe in cat 29D2- misfire cylinder 6 29DD- misfire cylinder 4 29CC- misfire multiple cylinders 2AAF- fuel pump plausibility 2AAE - Fuel pump 2C78- Lambda probe behind cat #2 The low pressure fuel pump is new so I doubt it's that. Could it be the high pressure fuel pump going out? He's got just over 80K so I hope the high pressure fuel pump would be covered if that is it. Other than having it towed it's not driveable to the dealership. It also has a JB4, VRSF Catless downpipes and a CRX FMIC. Would the dealership deny a warranty claim because of this? Can we take to it to our independent garage I trust instead? Sorry for all the questions, with his mods I want to tread carefully here.
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03-14-2016, 07:27 PM	#2
Rosetta Stoned Second Lieutenant 99 Rep 254 Posts Drives: 2022 M3, 2023 X3 Join Date: Sep 2009 Location: Denver CO iTrader: (2) Garage List 2023 BMW X3 M40i [0.00] 2022 BMW M3 Competi ... [0.00]	I'd think DME failure is the main cause from looking at those codes but I'm no expert. __________________ MINE: 2022 M3Cx, Sky Grey, Driv/Exec/Park/Laser 1/26 Ordered, 4/26 Prod, 5/4 Assembly, 5/9 Port, 7/11 Transit, 8/3 Port, 8/18 Dealer, 8/25 Delivered WIFE: 2023 x3 m40i
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03-14-2016, 07:43 PM	#3
Boland01 Lieutenant 151 Rep 460 Posts Drives: 2010 535ix, 2008, 2007 335i Join Date: Sep 2013 Location: Magnolia, TX iTrader: (0)	Hope not. I would think it might not even start if that was the case. Hopefully, someone else who has had a similar issue can advise.
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03-14-2016, 07:52 PM	#4
Tsujen First Lieutenant 87 Rep 319 Posts Drives: 2007 BMW 335i Join Date: Jan 2015 Location: Chicago iTrader: (1)	If anything take the jb4 out before going to the dealership. Worth the 30-60 minutes for thousand of dollars paying out of warranty. Never know it can help. Clear codes, map 0 than uninstall. I just took mine to the dealership with a fmic but took out the jb4 and they didn't say anything about that. Sounds like hpfp though from what you're describing, mine went out and had the same problems (idle and such) __________________ 07' 335i Monaco Blue - Cobb V3 / vrsf 7" fmic / vrsf cp / bms dci
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03-14-2016, 08:05 PM	#5
Boland01 Lieutenant 151 Rep 460 Posts Drives: 2010 535ix, 2008, 2007 335i Join Date: Sep 2013 Location: Magnolia, TX iTrader: (0)	Can an independent fix the HPFP under warranty? There is a person I trust right up the road. The Stealership will require a tow and I don't trust them.
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03-14-2016, 08:11 PM	#6
Game ------ 7422 Rep 10,226 Posts Drives: G87 M2 (sold) Join Date: Aug 2010 Location: Chicago'ish iTrader: (25)	Sounds like the dreaded DME failure. http://www.e90post.com/forums/showthread.php?t=734162 Luckily, it could be a fairly cheap fix. Dealership won't honor your warranty with the JB4 as the issue is related to the DME. Take a look at the link above and proceed what best suits you. Personally, I'd buy the new mosfets myself and have someone local solder them on. __________________
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03-14-2016, 08:26 PM	#7
Boland01 Lieutenant 151 Rep 460 Posts Drives: 2010 535ix, 2008, 2007 335i Join Date: Sep 2013 Location: Magnolia, TX iTrader: (0)	Will do - thank you!
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03-15-2016, 01:06 PM	#9
Cory S Major 305 Rep 1,163 Posts Drives: 2011 335i-X Join Date: Oct 2015 Location: N.H. iTrader: (0)	HPFP..... The first code triggered was probably the 2C78 and 2AAE
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03-15-2016, 04:12 PM	#10
Blowout81 Private 11 Rep 86 Posts Drives: Bmw 335 Join Date: Mar 2013 Location: New york iTrader: (1)	DME failure which then fried 2 engine coils (hence the misfire), and possibly 2 spark plugs. Link listed above is a great help. Relatively easy enough fix. Will save u $$$$$$
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03-15-2016, 05:50 PM	#11
muncie21 First Lieutenant 122 Rep 397 Posts Drives: 335ix Join Date: Sep 2015 Location: PA iTrader: (0)	Check the plugs and go from there. I 'believe' that a failed Mosfet will result in a non-working injector (e.g. closed all the time) if so, wet plugs would indicate an injector issue, rather than a DME/mosfet issue.
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03-19-2016, 12:03 AM	#12
ritzzzzzwik Captain 232 Rep 723 Posts Drives: SO M4 MT Join Date: Oct 2014 Location: NOVA iTrader: (0)	DME. If you have warranty get it replaced. If not, get the defective mosfets replaced on the DME. Also be sure to change the Spark Plugs, Coils, and Injectors. You could just do the mosfets and give it a shot, but most likely the the injectors have been damaged too, along with the coils. How do I know- happened to me
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03-20-2016, 07:41 AM	#13
muncie21 First Lieutenant 122 Rep 397 Posts Drives: 335ix Join Date: Sep 2015 Location: PA iTrader: (0)	OP, any updates?
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03-20-2016, 08:06 AM	#14
Boland01 Lieutenant 151 Rep 460 Posts Drives: 2010 535ix, 2008, 2007 335i Join Date: Sep 2013 Location: Magnolia, TX iTrader: (0)	Got the mosfets ordered, they will be here on Monday. I already pulled the DME so now it's just a matter of desoldering the old and soldering in the new mosfets. After that we'll see if that takes care of the problem or not. I ended up ordering extra's because they are so cheap. Last edited by Boland01; 03-20-2016 at 02:13 PM..
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03-22-2016, 08:01 AM	#15
Boland01 Lieutenant 151 Rep 460 Posts Drives: 2010 535ix, 2008, 2007 335i Join Date: Sep 2013 Location: Magnolia, TX iTrader: (0)	The mosfets arrived last night. After my son looked at the board and started to desolder one he decided it was best to have it sent out as his solder iron did not have an adjustable temperature capability. There is a person local in Houston we found on ebay. Sending it out today to him.
	Appreciate 0 Quote