Having some sputtering and bucking

e93WhiteonRed · 01-14-2011, 02:05 AM

If anyone is good at taking a look at some logs, I'd appreciate it. When the weather is on the 20's my car has run like crap. It was bucking and had a misfire and limp mode on cyl 6. Here are some logs, any idea what might be going on? I appreciate any help!!

e93WhiteonRed · 01-14-2011, 02:07 AM

Why wont it let me add the maps as attachments?

sorry guys...

e93WhiteonRed · 01-14-2011, 02:11 AM

Think I got it, should be 2 files to view. seemed like one had a rich spike in AFR and one file had a lean one...

OpenFlash · 01-14-2011, 02:11 AM

Try dropping boost to 10psi and see if it still sputters. That will rule out a few things. And email me at shiv@vishnutuning.com. I have something for you to try.

Shiv

Mikey_Bo0sts · 01-14-2011, 02:14 PM

Quote:

Originally Posted by shiv@vishnu

Try dropping boost to 10psi and see if it still sputters. That will rule out a few things. And email me at shiv@vishnutuning.com. I have something for you to try.

Shiv

Sounds like what I'm having, can I have the same thing to try ? or is that what you've sent me yesterday ?

NiVeDh · 01-14-2011, 02:29 PM

I have the same issue. E-mail sent.

themyst · 01-14-2011, 02:37 PM

OP - the good news is your fuel pump hasn't gone to shit

It's fine.

Mikey_Bo0sts · 01-14-2011, 02:53 PM

This is giving me pimples on my forehead.

Joshboody · 01-14-2011, 05:58 PM

Can anyone explain what is going on with these logs and the problem OP is experiencing? It looks like there's a major issue. I assume the new v5 maps will fix any low temp issues... not that I have to worry in AZ. Details on this would be appreciated.

Thanks

ps. what's "Can actual boost" compared to "boost" in the logging channels.

OpenFlash · 01-14-2011, 06:09 PM

Quote:

Originally Posted by Joshboody

Can anyone explain what is going on with these logs and the problem OP is experiencing? It looks like there's a major issue. I assume the new v5 maps will fix any low temp issues... not that I have to worry in AZ. Details on this would be appreciated.

Thanks

ps. what's "Can actual boost" compared to "boost" in the logging channels.

"CAN actual boost" is what the DME sees. It should be similar to "CAN boost target." "Boost" is real boost pressure at the TMAP sensor.

There are more than a few things that can cause sputtering when boost above a certain boost pressure. And they are always hardware related. The higher the cylinder pressure, the more load placed on the ignition system and more demands placed on the fuel system. If something is not working correctly, it will make itself known once you push higher power levels.

I know it's comforting to see others with issues and assume that there is a global problem. But it's a bit unfair to assume that given known issues/recalls with this car (injectors, coils, HPFP, etc,.)

Shiv

Joshboody · 01-14-2011, 06:34 PM

Quote:

Originally Posted by shiv@vishnu

"CAN actual boost" is what the DME sees. It should be similar to "CAN boost target." "Boost" is real boost pressure at the TMAP sensor.

There are more than a few things that can cause sputtering when boost above a certain boost pressure. And they are always hardware related. The higher the cylinder pressure, the more load placed on the ignition system and more demands placed on the fuel system. If something is not working correctly, it will make itself known once you push higher power levels.

I know it's comforting to see others with issues and assume that there is a global problem. But it's a bit unfair to assume that given known issues/recalls with this car (injectors, coils, HPFP, etc,.)

Shiv

From your earlier post, seemed like you may know the issue. I'm curious about the high AFRs in the logs.

01-14-2011, 02:05 AM	#1
e93WhiteonRed Second Lieutenant 19 Rep 267 Posts Drives: 2007 E93 Alpine white with Red Join Date: Jul 2010 Location: Reston, Virginia iTrader: (3) Garage List 2007 335I E93 [0.00]	Having some sputtering and bucking - read my logs If anyone is good at taking a look at some logs, I'd appreciate it. When the weather is on the 20's my car has run like crap. It was bucking and had a misfire and limp mode on cyl 6. Here are some logs, any idea what might be going on? I appreciate any help!! __________________ 2007 335I E93 sport package Alpine White. BMS DCI, PROcede V4, ACT street clutch, Michelin Pilot Sport A/S Plus and BT Tool. Pending install of Raceland Downpipes.
	Appreciate 0 Tweet Quote

01-14-2011, 02:07 AM	#2
e93WhiteonRed Second Lieutenant 19 Rep 267 Posts Drives: 2007 E93 Alpine white with Red Join Date: Jul 2010 Location: Reston, Virginia iTrader: (3) Garage List 2007 335I E93 [0.00]	Why wont it let me add the maps as attachments? sorry guys... __________________ 2007 335I E93 sport package Alpine White. BMS DCI, PROcede V4, ACT street clutch, Michelin Pilot Sport A/S Plus and BT Tool. Pending install of Raceland Downpipes.
	Appreciate 0 Quote

01-14-2011, 02:11 AM	#4
OpenFlash 1806 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	Try dropping boost to 10psi and see if it still sputters. That will rule out a few things. And email me at shiv@vishnutuning.com. I have something for you to try. Shiv Last edited by OpenFlash; 01-14-2011 at 02:23 AM..
	Appreciate 0 Quote

01-14-2011, 02:29 PM	#6
NiVeDh Major General 426 Rep 8,003 Posts Drives: '08 E90 335i, '99 E36 M3 Join Date: Apr 2009 Location: Houston, TX & Atlanta, GA iTrader: (132) Garage List 2008 BMW 335i Sedan [8.66]	I have the same issue. E-mail sent.
	Appreciate 0 Quote

01-14-2011, 02:37 PM	#7
themyst Major General 189 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	OP - the good news is your fuel pump hasn't gone to shit It's fine. __________________ E90 LCI N54 6AT
	Appreciate 0 Quote

01-14-2011, 02:53 PM	#8
Mikey_Bo0sts Banned 8 Rep 494 Posts Drives: 335i M Pack Join Date: Jan 2011 Location: Far Far Away, BKlyn NY =D iTrader: (0)	This is giving me pimples on my forehead.
	Appreciate 0 Quote

01-14-2011, 05:58 PM	#9
Joshboody Lieutenant Colonel 66 Rep 1,708 Posts Drives: pickemuptruck Join Date: Jul 2009 Location: Phoenix, AZ iTrader: (7)	Can anyone explain what is going on with these logs and the problem OP is experiencing? It looks like there's a major issue. I assume the new v5 maps will fix any low temp issues... not that I have to worry in AZ. Details on this would be appreciated. Thanks ps. what's "Can actual boost" compared to "boost" in the logging channels.
	Appreciate 0 Quote