[MARZPOPS]

29e1 mixture controll

Another code was 50 ?

30f

2f91

2a2c

2a2b

Here are the codes please help

[OB]

Originally Posted by Chromey

Cheers with continued reading and searching it seems the plugs and coils will go at some point sooner than later and perhaps injectors.. The tune speeds up the process... The cost of performance lol...

Well, plugs are just regular maintenance items… Gonna need to change them tuned or not. Just another interval when tuned mate.

[Jeff@TopGearSolutions]

Originally Posted by Spaceegrayy

29e1 mixture controll

Another code was 50 ?

30f

2f91

2a2c

2a2b

Here are the codes please help

30FF BOOST LEAK

2F91 engine speed limitation with vehicle stationary

2a2c fuel mixture control 2

2a2b fuel mixture control

I read on N54-Tech that it was a bad JB4 board. Not to scare you yet but you should clear the codes and see which come back first.

Then I always like to update firmware and maps on any tunes and reset adaptations.

If that doesn't work then I like to take the tune out and see if the codes still persist.

At the end of the day you need to find the boost leak which could be anywhere pre intercooler all the way to the throttle body and in between.

[MARZPOPS]

Originally Posted by Jeff@TopGearSolutions

30FF BOOST LEAK

2F91 engine speed limitation with vehicle stationary

2a2c fuel mixture control 2

2a2b fuel mixture control

I read on N54-Tech that it was a bad JB4 board. Not to scare you yet but you should clear the codes and see which come back first.

Then I always like to update firmware and maps on any tunes and reset adaptations.

If that doesn't work then I like to take the tune out and see if the codes still persist.

At the end of the day you need to find the boost leak which could be anywhere pre intercooler all the way to the throttle body and in between.

I just took jb4 out and did not clear codes, now i have a service engine soon light ? I will be changing plugs tomorow but what is possibly making my car have no power, everytime i accelerate fast i feel no boost and half engine comes on

[Jeff@TopGearSolutions]

Originally Posted by Jeff@TopGearSolutions

Link didn't work.

Probably boost leak. Did you pop the hood and look for anything obvious like a charge pipe blown off or cracked?

Originally Posted by Spaceegrayy

29e1 mixture controll

Another code was 50 ?

30f

2f91

2a2c

2a2b

Here are the codes please help

Originally Posted by Jeff@TopGearSolutions

30FF BOOST LEAK

2F91 engine speed limitation with vehicle stationary

2a2c fuel mixture control 2

2a2b fuel mixture control

I read on N54-Tech that it was a bad JB4 board. Not to scare you yet but you should clear the codes and see which come back first.

Then I always like to update firmware and maps on any tunes and reset adaptations.

If that doesn't work then I like to take the tune out and see if the codes still persist.

At the end of the day you need to find the boost leak which could be anywhere pre intercooler all the way to the throttle body and in between.

Originally Posted by Spaceegrayy

I just took jb4 out and did not clear codes, now i have a service engine soon light ? I will be changing plugs tomorow but what is possibly making my car have no power, everytime i accelerate fast i feel no boost and half engine comes on

You have a boost leak. Pop the hood and take a look. Any connection on your intercooler, charge pipe or towards throttle could be uncoupled, leaking, cracked ETC

Also any vacuum lines could be torn or leaking too. There are several under the engine bay.

Most people with aftermarket intercoolers usually have a leak at the intercooler connections though. So check and tighten them.

You should probably make a new thread in the regular section as this thread is primarily for first time tuners and misfires.

[Sunny31]

So I went ahead and changed all 6 injectors and coded them. Started up the car but the SES light is still on. The car no longer sputters or sounds like its gonna cut out when started up. Havent taken it out for a drive yet, still got to put the cowling and stuff back on. Any ideas why SES light still on?

[Sunny31]

Originally Posted by Sunny31

So I went ahead and changed all 6 injectors and coded them. Started up the car but the SES light is still on. The car no longer sputters or sounds like its gonna cut out when started up. Havent taken it out for a drive yet, still got to put the cowling and stuff back on. Any ideas why SES light still on?

Been driving all day today and SES light is still there. Hooked up the laptop and got these codes




Quick translation is the following
fuel at high pressure to release the injection
pressure too low
error is not currently available, not obd-debounced
error does not cause the warning lamp light up

Are these old codes stored in the computer that need to be cleared?

[beetle6986]

My friend just bought a 2008 335xi. On the drive home we found out that it had a bad misfire. We changed all of the plugs with new ones and replaced all coils with the coils removed from my 335 (which does not have a misfire). This didn't resolve the issue. So I guess it is the injectors? I hooked up my laptop with the inpa software to read the codes. It said misfire in cylinders 5 and 6. So I check the injectors... cylinder 5 and 6 have this new injector (index 11). All other cylinders have old injectors (not the originals. They have the second revised injectors). Could these two new injectors be bad?

[beetle6986]

we replaced the injectors for cylinders 4, 5 and 6 with new injectors (index 12). That still didn't resolve the misfire issue. Next I think we will replace the injectors in cylinder 1 and 2 with the -11 index injectors we took out of cylinders 5 and 6.

[firemanjust1]

I had issues that were close to what you are describing multiple misfires codes would not clear after changing all plugs all coils still persisted. I left it overnight battery disconnected to reset adaptions and next day after running like a tractor for 3 days problem was gone no misfires, worth a try a can't hurt and it is free.

[beetle6986]

Originally Posted by firemanjust1

I had issues that were close to what you are describing multiple misfires codes would not clear after changing all plugs all coils still persisted. I left it overnight battery disconnected to reset adaptions and next day after running like a tractor for 3 days problem was gone no misfires, worth a try a can't hurt and it is free.

I unhooked the battery for a couple of days. That didn't seem to change anything. It was worth a shot.

Cylinders 4,5 and 6 have the new injectors I put in, which didn't have any impact on the misfires. That tells me that the old injectors I took out must have been OK. I already put two of them back in cylinders 1 and 2 (because they had the really old injector part numbers). That didnt help. Lastly, I'm going to put the other one I took out and put it in cylinder 3. Hopefully that will do the job. I already replaced spark plugs and put in coils from another care.

[beetle6986]

Originally Posted by beetle6986

I unhooked the battery for a couple of days. That didn't seem to change anything. It was worth a shot.

Cylinders 4,5 and 6 have the new injectors I put in, which didn't have any impact on the misfires. That tells me that the old injectors I took out must have been OK. I already put two of them back in cylinders 1 and 2 (because they had the really old injector part numbers). That didnt help. Lastly, I'm going to put the other one I took out and put it in cylinder 3. Hopefully that will do the job. I already replaced spark plugs and put in coils from another care.

Well, all plugs, injectors and coils have been changed. The car just had all of the intake valves cleaned and It has a new high pressure fuel pump. The car still misfires constantly while accelerating. I think this will be his first and last BMW (1 month of ownership). Anybody interested in a 2008 335XI with manual trans? Only has 60k miles but runs like a tractor.

[twopacksugar]

first time 335i owner! 2007 black/black, 6mt, navi, sport, premium

excited to join e90post

[Morpheus]

Originally Posted by beetle6986

Well, all plugs, injectors and coils have been changed. The car just had all of the intake valves cleaned and It has a new high pressure fuel pump. The car still misfires constantly while accelerating. I think this will be his first and last BMW (1 month of ownership). Anybody interested in a 2008 335XI with manual trans? Only has 60k miles but runs like a tractor.

Beetle have a look at this thread

http://www.e90post.com/forums/showth...+solder&page=6

Most likely the ecu is your problem. May be covered under emissions warranty. Good luck.

[CROWNE]

Mod suggestions for stock 2007 335i..downpipes&exhaust..etc?

[headsup7up]

I feel everyones pain. i started getting a misfire last year so i replaced the plugs and all seemed to be fine, at least for a few hundred miles. i then brought it to the dealer where they replaced all my injectors with the new updated ones and the problem wasn't fixed, so i figured i would replace the coils and the plugs again. After those the car ran fine for a few hundred miles again. when the misfire started again, i brought it to a friend who is a bmw tech, he noticed a mouse had chewed some of my coil pack and injector wires. i bought and replaced that, nothing changed after the wire harness so i gave up. after a few weeks of just ignoring the problem the misfire got worse and worse until the car would no longer fire on cyl1 at all. So i brought the car back to bmw where they found i had no compression on cyl 1. so now i have a new 0 mile long-block, new injectors, new coils, new plugs, new wire harness and now after 1000 miles... i have a misfire at idle again.

[bbstoke]

Misfire started last week with the engine management light on.
Took it in today and the codes thrown up are as follows..

29cc Misfire detection
29cf Misfire cylinder 3 in 2d firing sequence
29c0 or d Misfire cylinder in 1st firing

The mech changed the spark plugs, still doing it.

Cars still in, he's getting no volts from the knock sensor

Any clues anyone ?

Wondering of anyone has had these codes before?

[bbstoke]

Had it done today, it was coils , so had set of plugs and three coils on.. £170 ( $280) that's with the parts , labour and plug in -reset
Cars running great now... hope this helps someone else

[mistertml]

Hi
Are people still having issues with their SI's.

I've just purchased one and it's showing misfires on cylinders 1-2. And this is after changing the sparks and coils on all 4 cylinders.
Had a compression test done and this is showing low compression on the the cylinders.

Is it already time to give the car back?

[tc535i]

is anybody running colder plugs than stock? I'd think that with the mods we throw at these things they're prefer a colder temp range than the stock stuff, but I suppose without a misfire/timing pull there's no real reason to change them... are people running stock on the fbo/meth/18psi cars too?

[divisionbell77]

Originally Posted by JETBLK335i

Hi all. hope this is the right thread, but can anyone tell me if this chart looks ok?

im running proceed REV 2.5 and DCI.

im going to replace the spark plugs as a starting point, but i am throwing the following codes

CD87, 29CD, 29CF, 29CC, CDA7

What was the resolution to CD87?

[xjohnnyleex]

I was having misfire in cylinder 5 under load.

After changing plugs and coils and verifying injectors were not the issue, a cleaning of the intake valves via walnut blasting looks to have fixed the problem.