Need Help In Nc

RockChalkKU · 10-26-2012, 08:56 AM

I am having some issues with my car.2007 335i. Misfires on 4-6, O2 sensors reading lean. Started with just changing the sparkplugs to no avail. I would like to see if anyone has a BMW diagnostic scanner or something that is more in depth than just a normal code reader. Or if you know someone who has had similar problems, please advise!

GRLPWR · 10-26-2012, 01:55 PM

Are you tuned? If so, which one?

RockChalkKU · 10-26-2012, 03:18 PM

I have a JB3. I am trying to get a JB4 right now.

GRLPWR · 10-26-2012, 04:32 PM

I had similiar symptoms and did everything I could possibly think of to fix it - replaced all 4 o2 sensors, replaced spark plugs, even got a walnut blast. It wasn't until I removed my JB3 (to send it off for the upgrade) that I stopped getting these codes/misfires. I haven't seen a code or had a misfire (except for once recently, got a 1/2 engine light but the code was for something like a low fuel blah,blah,blah...sorta weird) since I put in the JB4. I'm thinking maybe the +3 wasn't compatible w/the ecu software upgrade I received when I had my injectors replaced (which I was hoping would fix the misfires, but it didn't). Call it coincidence or just in need of an upgrade, but I'd do the upgrade and see if that works.

RockChalkKU · 10-27-2012, 12:43 PM

Did it all go away when you pulled the JB3? If I can get the car running without the JB3 installed, that would be nice while I am waiting for the upgrade.

GRLPWR · 10-27-2012, 07:39 PM

Quote:

Originally Posted by RockChalkKU

Did it all go away when you pulled the JB3? If I can get the car running without the JB3 installed, that would be nice while I am waiting for the upgrade.

I haven't had any problems since I upgraded. I didn't have any problems while the tune was out, car drove fine, minus the cat/o2 codes I got which I was expecting. None of the other codes came back after removing the tune and after installing the upgrade. The car will drive noticeably slower compared to when it's installed. Nothing unusual.

10-26-2012, 08:56 AM	#1
RockChalkKU Chump 131 Rep 289 Posts Drives: '16 LBB M2/'18 X3 M40i/'16 X5d Join Date: Sep 2012 Location: Lower Alabama...for now. iTrader: (2)	Need Help In Nc I am having some issues with my car.2007 335i. Misfires on 4-6, O2 sensors reading lean. Started with just changing the sparkplugs to no avail. I would like to see if anyone has a BMW diagnostic scanner or something that is more in depth than just a normal code reader. Or if you know someone who has had similar problems, please advise!
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10-26-2012, 01:55 PM	#2
GRLPWR Lieutenant 41 Rep 487 Posts Drives: '07 335i Join Date: Aug 2010 Location: Durham, NC iTrader: (0) Garage List 2007 335i [0.00]	Are you tuned? If so, which one? __________________ http://s745.photobucket.com/albums/x...view=slideshow
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10-26-2012, 03:18 PM	#3
RockChalkKU Chump 131 Rep 289 Posts Drives: '16 LBB M2/'18 X3 M40i/'16 X5d Join Date: Sep 2012 Location: Lower Alabama...for now. iTrader: (2)	I have a JB3. I am trying to get a JB4 right now.
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10-26-2012, 04:32 PM	#4
GRLPWR Lieutenant 41 Rep 487 Posts Drives: '07 335i Join Date: Aug 2010 Location: Durham, NC iTrader: (0) Garage List 2007 335i [0.00]	I had similiar symptoms and did everything I could possibly think of to fix it - replaced all 4 o2 sensors, replaced spark plugs, even got a walnut blast. It wasn't until I removed my JB3 (to send it off for the upgrade) that I stopped getting these codes/misfires. I haven't seen a code or had a misfire (except for once recently, got a 1/2 engine light but the code was for something like a low fuel blah,blah,blah...sorta weird) since I put in the JB4. I'm thinking maybe the +3 wasn't compatible w/the ecu software upgrade I received when I had my injectors replaced (which I was hoping would fix the misfires, but it didn't). Call it coincidence or just in need of an upgrade, but I'd do the upgrade and see if that works. __________________ http://s745.photobucket.com/albums/x...view=slideshow
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10-27-2012, 12:43 PM	#5
RockChalkKU Chump 131 Rep 289 Posts Drives: '16 LBB M2/'18 X3 M40i/'16 X5d Join Date: Sep 2012 Location: Lower Alabama...for now. iTrader: (2)	Did it all go away when you pulled the JB3? If I can get the car running without the JB3 installed, that would be nice while I am waiting for the upgrade.
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