Throttle hesitation/stumbling/hunting problem at 2-4% accel pedal position

AndyW · 09-16-2016, 11:47 PM

Replacing the battery did not fix.

Taking it to the dealer on the 4th to get all the ECU's updated and reset. $275. Worth it at this point IMO.

tofu? · 09-17-2016, 12:42 PM

Quote:

Originally Posted by AndyW

Replacing the battery did not fix.

Taking it to the dealer on the 4th to get all the ECU's updated and reset. $275. Worth it at this point IMO.

good luck

my revs bounce at idle when i apply approximately 2-4% throttle, but driveability has been unaffected

injectors, plugs, map sensor, vanos -- nothing fixed it

AndyW · 09-17-2016, 12:51 PM

Quote:

Originally Posted by tofu?

good luck

my revs bounce at idle when i apply approximately 2-4% throttle, but driveability has been unaffected

injectors, plugs, map sensor, vanos -- nothing fixed it

Wish it only affected idle. Affects drivability too, for me.

tofu? · 09-17-2016, 01:21 PM

Quote:

Originally Posted by AndyW

Wish it only affected idle. Affects drivability too, for me.

small problems like these are why owning these cars out of warranty sucks. I haven't focused on it must because i don't want to blindly throw money at the car without a guaranteed fix. The parts i replaced were going bad to begin with or i wouldn't have touched anything beyond plugs and coils.

thanks for going the extra step to diagnose this. I think it's a common issue that a lot of people like myself just "let go" because it has been impossible to pinpoint

AndyW · 09-17-2016, 01:27 PM

Quote:

Originally Posted by tofu?

small problems like these are why owning these cars out of warranty sucks. I haven't focused on it must because i don't want to blindly throw money at the car without a guaranteed fix. The parts i replaced were going bad to begin with or i wouldn't have touched anything beyond plugs and coils.

thanks for going the extra step to diagnose this. I think it's a common issue that a lot of people like myself just "let go" because it has been impossible to pinpoint

I hear you and am in a similar spot...don't really regret replacing the stuff I did ...I'm a tenacious bastard, tho' and am going to get to the bottom of this...

galahad05 · 09-19-2016, 11:18 AM

Man this problem is a little bugger.

AndyW · 09-19-2016, 03:05 PM

Quote:

Originally Posted by galahad05

Man this problem is a little bugger.

Gonna smoke test today just to make sure there are no unmetered air problems.

If that doesn't work, I think I'll disconnect the boost solenoids one at a time just to see if something is going on there.

cwarren · 09-20-2016, 12:44 AM

fwiw mine is getting so bad drive ability is shot . Been so busy i just cant work on the damn thing . Have three walls up on the new garage though

. i did replace VC and pcv related parts vac lines just showed up for the second time because they sent me shit the first time

bank 1 and 2 upstream done swapped tmap nothing has helped .

AndyW · 09-20-2016, 09:51 AM

Quote:

Originally Posted by cwarren

fwiw mine is getting so bad drive ability is shot . Been so busy i just cant work on the damn thing . Have three walls up on the new garage though

. i did replace VC and pcv related parts vac lines just showed up for the second time because they sent me shit the first time

bank 1 and 2 upstream done swapped tmap nothing has helped .

Sorry about the car...awesome about the garage!

Mine has stayed pretty much the same...a pebble in my shoe...I'll keep posting as I try stuff. Gotta stumble across the answer at some point...

galahad05 · 09-21-2016, 09:51 PM

Just for fun, take some readings on your new battery, with engine off, on, idling. Just to make sure it isn't maybe the alternator or the monitor.

AndyW · 09-22-2016, 09:22 PM

Quote:

Originally Posted by galahad05

Just for fun, take some readings on your new battery, with engine off, on, idling. Just to make sure it isn't maybe the alternator or the monitor.

12.18V off. 14.09V Idling.

Got a new shadow code today though...29E1! No SEL. So I will now focus efforts on bank 2. Gotta be air (unlikely), fuel (bad injector?) or spark (just replaced plugs so coil).

AndyW · 09-22-2016, 10:15 PM

Something is wrong when you *hope* for an SEL and a misfire code pointing to a specific cylinder...

Luckystrike24 · 09-23-2016, 04:17 PM

What is your stft and ltft whIle idling and while 2-4% thottle. If it gives you bank 1 and bank 2 stft and ltft post all the values. The car will have to go into open loop before the stft and ltft will start adjusting, so if you start the car cold it may take a minute or two what I'm looking for is a general trend at idle it should be pretty easy to see but at 2 to 4% throttle it may vary and fluctuate a lot

FamilyManTrackSedan · 09-23-2016, 04:48 PM

Maybe something fell into your engine during an oil change, like a Hunger Games figurine or a spatula, or an old Master Lock from your high school gym class.

I worry about it every time I do an oil change.

cn555ic · 09-23-2016, 09:46 PM

Quote:

Originally Posted by AndyW

Replacing the battery did not fix.

Taking it to the dealer on the 4th to get all the ECU's updated and reset. $275. Worth it at this point IMO.

Did you register the new battery?

AndyW · 09-24-2016, 01:27 AM

Quote:

Originally Posted by Luckystrike24

What is your stft and ltft whIle idling and while 2-4% thottle. If it gives you bank 1 and bank 2 stft and ltft post all the values. The car will have to go into open loop before the stft and ltft will start adjusting, so if you start the car cold it may take a minute or two what I'm looking for is a general trend at idle it should be pretty easy to see but at 2 to 4% throttle it may vary and fluctuate a lot

link to datazap on 1st post. Yes, they vary in time with the RPM changes.

AndyW · 09-24-2016, 01:28 AM

Quote:

Originally Posted by FamilyManTrackSedan

Maybe something fell into your engine during an oil change, like a Hunger Games figurine or a spatula, or an old Master Lock from your high school gym class.

I worry about it every time I do an oil change.

I'm missing an old Gizmo figurine from the movie "Gremlins"...this all makes sense now!

AndyW · 09-24-2016, 01:29 AM

Quote:

Originally Posted by cn555ic

Did you register the new battery?

Yes. used the tool in Carly. Wouldn't have mattered, actually. Battery was nearly identical parameter wise (92 vs 90 ah, 850 vs 900CCA - Bosch brand).

AndyW · 10-04-2016, 06:09 PM

Well, the plot thickens, as it were. Car at dealership. During firmware upgrade/recoding CAS would not reboot and I'm told I'll need a new one. Over a grand to reinstall/reprogram.

Not sure if(or how) this may be related to my issue but I have noticed reduced range on my key fob and irregular comfort access door handle sensors so maybe it was failing. SA says he sees about "1 in 50" fail like this.Lucky me.

AndyW · 10-08-2016, 12:18 PM

Problem appears to be solved!!!!

Only problem is that I don't know if it was the ECU reset or the CAS replacement that did it. Gonna drive it in stock mode for a while before reflashing to MHD and Alpina.

SA only charged me for the CAS replacement so I got the coding for free. So there's that.

Of note, I have a Y connection for my ODB II port so I can leave my DCAN to usb cable hooked up all the time and have everything routed nicely in the dash. SA said that could have contributed to the CAS coding failure. Not sure I buy that but I'll unplug it before taking to the dealer next time.

tealslug · 10-17-2016, 12:28 AM

I have an appt. with the dealer later this week - is there any information specific to the ECU upgrade that you can share so that I may have the most amount of details to pass on? Version numbers, detailed description of work done, job codes, etc? Things I can use to speak in terms the service writer / tech might understand?

Andy.

WedgePerformance · 10-17-2016, 12:45 AM

cwarren brought his car by my house today and I reset all of the modules to default with NCSExpert and then reset his adaptations. Apparently his car was really bad and on the way home it was fine. Hopefully he can chime in... I used the recovery profile and blank man to reset the modules to default and then with INPA I cleared codes and reset all adaptations.

09-16-2016, 11:47 PM	#67
AndyW Supreme Galactic Commander (one galaxy over...) 704 Rep 1,787 Posts Drives: '08 E93, '12 E82, '13 E93 M3 Join Date: Feb 2012 Location: Washington, USA iTrader: (5)	Replacing the battery did not fix. Taking it to the dealer on the 4th to get all the ECU's updated and reset. $275. Worth it at this point IMO. __________________ Best, Andy '12 E82-PS2,Stoptechs,Clubsports+M3 bits,Accusump,Wagner DP+EVO III FMIC,ERCP,BMS Intake,Mason Strut Bar,Wedge Tune
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09-19-2016, 11:18 AM	#72
galahad05 Brigadier General 158 Rep 3,158 Posts Drives: '07 335i e90 Join Date: Mar 2008 Location: Long Island NY iTrader: (0)	Man this problem is a little bugger. __________________ Always do right. This will gratify some people and astonish the rest. --Mark Twain
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09-20-2016, 12:44 AM	#74
cwarren Captain 83 Rep 725 Posts Drives: 08 e92 Join Date: Jan 2012 Location: portland iTrader: (1)	fwiw mine is getting so bad drive ability is shot . Been so busy i just cant work on the damn thing . Have three walls up on the new garage though . i did replace VC and pcv related parts vac lines just showed up for the second time because they sent me shit the first time bank 1 and 2 upstream done swapped tmap nothing has helped . __________________ ptf MHD E85 /Hexon rr550 turbo's/PRE custom intakes/CP / bms dp's/hfs4 / er fmic/PSS/spec stage 2+/kwv2/steveAZ stage 3 lpfp /m3 control arms/powerflex black/MF LSD /fuel it port injection
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09-21-2016, 09:51 PM	#76
galahad05 Brigadier General 158 Rep 3,158 Posts Drives: '07 335i e90 Join Date: Mar 2008 Location: Long Island NY iTrader: (0)	Just for fun, take some readings on your new battery, with engine off, on, idling. Just to make sure it isn't maybe the alternator or the monitor. __________________ Always do right. This will gratify some people and astonish the rest. --Mark Twain
	Appreciate 0 Quote

09-22-2016, 10:15 PM	#78
AndyW Supreme Galactic Commander (one galaxy over...) 704 Rep 1,787 Posts Drives: '08 E93, '12 E82, '13 E93 M3 Join Date: Feb 2012 Location: Washington, USA iTrader: (5)	Something is wrong when you hope for an SEL and a misfire code pointing to a specific cylinder... __________________ Best, Andy '12 E82-PS2,Stoptechs,Clubsports+M3 bits,Accusump,Wagner DP+EVO III FMIC,ERCP,BMS Intake,Mason Strut Bar,Wedge Tune
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09-23-2016, 04:17 PM	#79
Luckystrike24 Private First Class 56 Rep 165 Posts Drives: '09, 335XI, Manual, E90 Join Date: Sep 2012 Location: Central Florida iTrader: (1)	What is your stft and ltft whIle idling and while 2-4% thottle. If it gives you bank 1 and bank 2 stft and ltft post all the values. The car will have to go into open loop before the stft and ltft will start adjusting, so if you start the car cold it may take a minute or two what I'm looking for is a general trend at idle it should be pretty easy to see but at 2 to 4% throttle it may vary and fluctuate a lot Last edited by Luckystrike24; 09-23-2016 at 06:13 PM..
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09-23-2016, 04:48 PM	#80
FamilyManTrackSedan Lieutenant 112 Rep 409 Posts Drives: 2008 pre-lci 335xi 6mt sedan Join Date: Apr 2015 Location: NJ iTrader: (6)	Maybe something fell into your engine during an oil change, like a Hunger Games figurine or a spatula, or an old Master Lock from your high school gym class. I worry about it every time I do an oil change.
	Appreciate 0 Quote

10-04-2016, 06:09 PM	#85
AndyW Supreme Galactic Commander (one galaxy over...) 704 Rep 1,787 Posts Drives: '08 E93, '12 E82, '13 E93 M3 Join Date: Feb 2012 Location: Washington, USA iTrader: (5)	Well, the plot thickens, as it were. Car at dealership. During firmware upgrade/recoding CAS would not reboot and I'm told I'll need a new one. Over a grand to reinstall/reprogram. Not sure if(or how) this may be related to my issue but I have noticed reduced range on my key fob and irregular comfort access door handle sensors so maybe it was failing. SA says he sees about "1 in 50" fail like this.Lucky me.
	Appreciate 0 Quote

10-08-2016, 12:18 PM	#86
AndyW Supreme Galactic Commander (one galaxy over...) 704 Rep 1,787 Posts Drives: '08 E93, '12 E82, '13 E93 M3 Join Date: Feb 2012 Location: Washington, USA iTrader: (5)	Problem appears to be solved!!!! Only problem is that I don't know if it was the ECU reset or the CAS replacement that did it. Gonna drive it in stock mode for a while before reflashing to MHD and Alpina. SA only charged me for the CAS replacement so I got the coding for free. So there's that. Of note, I have a Y connection for my ODB II port so I can leave my DCAN to usb cable hooked up all the time and have everything routed nicely in the dash. SA said that could have contributed to the CAS coding failure. Not sure I buy that but I'll unplug it before taking to the dealer next time.
	Appreciate 0 Quote

10-17-2016, 12:28 AM	#87
tealslug New Member 3 Rep 8 Posts Drives: 335i Sedan Join Date: May 2016 Location: US iTrader: (0)	I have an appt. with the dealer later this week - is there any information specific to the ECU upgrade that you can share so that I may have the most amount of details to pass on? Version numbers, detailed description of work done, job codes, etc? Things I can use to speak in terms the service writer / tech might understand? Andy.
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10-17-2016, 12:45 AM	#88
WedgePerformance BimmerPost Supporting Vendor 1342 Rep 1,701 Posts Drives: Slot Machines.. Keep Taking $ Join Date: Oct 2013 Location: Portland, OR iTrader: (0) Garage List 2007 BMW 335i Sport [9.67]	cwarren brought his car by my house today and I reset all of the modules to default with NCSExpert and then reset his adaptations. Apparently his car was really bad and on the way home it was fine. Hopefully he can chime in... I used the recovery profile and blank man to reset the modules to default and then with INPA I cleared codes and reset all adaptations.
	Appreciate 1 C.Pop64.50 Quote