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      04-28-2013, 06:07 AM   #1
mr-pham
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bmw code 29d2 help!!!

I have a e90 325i

Anyone know anything about engine code 29d2???

My car feels like it has no power and the engine is no running right....

Thank you if someone can help!
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      04-28-2013, 06:15 AM   #2
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google is your friend...

https://www.google.com.au/search?q=e...hrome&ie=UTF-8
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      04-28-2013, 08:23 PM   #3
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The code by memory is a Cyl 6 misfire.

Causes could possibly be a coil, worn plugs or even an injector!

How old are these items, how many kms on the car?
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      04-29-2013, 05:44 AM   #4
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Yes it was the Cyl 6 misfire. Car done 65xxxkms. Still got 15xxxkms on the spark plug

Thanks guys all done now.
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      07-16-2014, 11:37 PM   #5
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What ended being the problem?
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      07-17-2014, 12:45 AM   #6
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Originally Posted by Fisenko View Post
What ended being the problem?
http://www.e90post.com/forums/showpo...52&postcount=4
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      07-19-2014, 12:26 AM   #7
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Ok but was it a spark plug, or a coil or injector?
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      08-06-2016, 08:51 PM   #8
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Sorry to bump an old thread but this seemed like the best place to post. 29D2 Code (Cyl. 6 Missfire) randomly appeared today after doing an AT Trans Adaptation Reset (I changed the fluid and filter so I did a reset), I don't presume they're related but I thought I'd mention it.

08' 335xi 48K miles. Plugs replaced a month ago. Walnut blasting not yet done.

I pulled the plug on 6 and inspected, everything looked fine, swapped coils on 1 and 6, cleared codes, started and 29D2 shows up again along with a rough idle and plenty of hesitation at low speeds (at higher speeds it drives completely fine).

I want to rule out all possibilities before buying new injectors. Injectors were serviced by BMW in 2011 by the original owner under warranty, looks like they only replaced two though

Cyl. 1 - 85261-09
Cyl. 2 - 65138-06
Cyl. 3 - 85261-09
Cyl. 4 - 65138-06
Cyl. 5 - 65138-06
Cyl. 6 - 65138-06

RockAuto only has 4 injectors available for sale, should I replace my four Index 06 injectors or just replace the cylinder 6 injector? Is there any surefire way to check that the injector is my issue and nothing else?
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      08-06-2016, 09:17 PM   #9
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if you have a working copy of inpa (or know somebody who does) you could swap the injectors around and see if the misfire follows.

also assuming you swapped cyl 6 plug ? you only mentioned swapping the coil.

if you go the latest index you need to get 3 and put them all in the same bank then you could always keep the good two as spares for the other bank. if you want to replace that 06 injector in bank one you need to put new injectors in that entire bank.

if you've got the ability to log a leaking injector would show up on fuel trims however not sure if it will show up if it's a bad spray pattern.

maybe put some injector cleaner and give it a good run on the freeway? as you mentioned it runs fine at speed.
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      08-06-2016, 09:44 PM   #10
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Quote:
Originally Posted by titium View Post
if you have a working copy of inpa (or know somebody who does) you could swap the injectors around and see if the misfire follows.

also assuming you swapped cyl 6 plug ? you only mentioned swapping the coil.

if you go the latest index you need to get 3 and put them all in the same bank then you could always keep the good two as spares for the other bank. if you want to replace that 06 injector in bank one you need to put new injectors in that entire bank.

if you've got the ability to log a leaking injector would show up on fuel trims however not sure if it will show up if it's a bad spray pattern.

maybe put some injector cleaner and give it a good run on the freeway? as you mentioned it runs fine at speed.
Thank you for your help and prompt response titium

If swapping injectors around don't I need new seals and/or decoupling elements every time? I think my Amazon OBD2 cable came with some sort of a bootleged copy of INPA but I've never used it

Sorry, yes I did also swap the plugs, not just the coil.

That makes sense, so essentially I'd need to order 3 injectors and replace injectors on cylinders 4, 5, 6 (that's Bank 2 right?). And leave cylinders 1, 2 ,3 alone?

Injector cleaner as in the stuff you add to your fuel tank? Yah the hesitation seems worst when at idle and getting going from a stop once I'm already moving 30MPH+ the car seems to drive fine (well substantially better).

There's no way it's just bad carbon build up that a Walnut blast could fix? Nearly 50K miles and I'm almost certain the previous owner didn't do a blast.
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Last edited by 94boosted; 08-06-2016 at 09:49 PM.
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      08-06-2016, 10:23 PM   #11
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yer probably need new decoupling elements but they are cheap anyway. you might be able to get away with reusing the old ones for testing purposes but don't take my word for it.

start with a bottle of in tank injector cleaner. techron is what i used. quite amazing that even with 2500psi of pressure these injectors still get clogged up.

if that doesn't help then you need to log and look at your fuel trims. but if you've ruled out 2/4 causes and the misfires are confined to 1cyl walnut blasting is unlikely to help in fixing the misfire.

for the injector cleaner make sure you run it for atleast 20-30km continuously as a minimum. in my experience when i was getting rough cold start and slight misfires on idle (no codes). the injector cleaner fixed it right up and it was like a switch after 20km throttle response noticeably improved. by half a tank 95% of my issues where gone.
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      08-06-2016, 11:07 PM   #12
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Quote:
Originally Posted by titium View Post
yer probably need new decoupling elements but they are cheap anyway. you might be able to get away with reusing the old ones for testing purposes but don't take my word for it.

start with a bottle of in tank injector cleaner. techron is what i used. quite amazing that even with 2500psi of pressure these injectors still get clogged up.

if that doesn't help then you need to log and look at your fuel trims. but if you've ruled out 2/4 causes and the misfires are confined to 1cyl walnut blasting is unlikely to help in fixing the misfire.

for the injector cleaner make sure you run it for atleast 20-30km continuously as a minimum. in my experience when i was getting rough cold start and slight misfires on idle (no codes). the injector cleaner fixed it right up and it was like a switch after 20km throttle response noticeably improved. by half a tank 95% of my issues where gone.
Well I'd much rather try $10 injector cleaner than $1000 injectors haha, thanks for the tip.

As a side note would a set of re-manufactured injectors be a bad idea? At less than half the cost of a new set they're tempting http://www.ebay.com/itm/6-x-OEM-FUEL...JXWJN1&vxp=mtr
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      08-09-2016, 12:23 PM   #13
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Injector cleaner did not work (I did drive it for about 30km's) and the misfire is definitely not improving. I've ordered 6 of the reman'd Index 09 Injectors from eBay (http://www.ebay.com/itm/6-x-OEM-FUEL...JXWJN1&vxp=mtr) at that price even if they only last for 40K km's I'd be happy.
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      08-15-2016, 10:51 AM   #14
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Switched out the injectors for some re-manufactured Index 09's and misfire is gone.
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      08-15-2016, 10:54 AM   #15
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Quote:
Originally Posted by 94boosted View Post
Switched out the injectors for some re-manufactured Index 09's and misfire is gone.
Good stuff!
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