[Glowin]

Originally Posted by Maniac0908

Subscribed

I see you're going crazy subscribing in a few threads...

You realize that there's a drop down menu at the top of every thread, called "Thread Tools", where you click a link to do that? You don't need to actually post in the thread to be able to subscribe to it...

It's just annoying to see a thread bumped like that with no extra info...

[Chromey]

Sorry to chime in just bought a 09 335i coupe with 35000km on the odometer and after a lot of research I was about to buy the jb4 tune with the DCI but then I just saw this thread resurrected to the top which I have now read through post 1 to the end. Can I assume that the JB4 or Cobb tunes will most definitely increase or guarantee that I will need to do spark plugs and coils etc soon. Or are the people on here claiming misfires and codes just a handful of people but there are hopefully many happy jb4 owners who have been driving there tuned 335i and not run into these issues? I guess what I'm asking is are these misfires a absolute certain path when you tune your car even with 35000km on a 09????

[Maniac0908]

Originally Posted by Chromey

Sorry to chime in just bought a 09 335i coupe with 35000km on the odometer and after a lot of research I was about to buy the jb4 tune with the DCI but then I just saw this thread resurrected to the top which I have now read through post 1 to the end. Can I assume that the JB4 or Cobb tunes will most definitely increase or guarantee that I will need to do spark plugs and coils etc soon. Or are the people on here claiming misfires and codes just a handful of people but there are hopefully many happy jb4 owners who have been driving there tuned 335i and not run into these issues? I guess what I'm asking is are these misfires a absolute certain path when you tune your car even with 35000km on a 09????

I have a 07 with a out 85k. Been running jb4 for 10k. No issues at all. I did however at 9k with jb4 UPGRADE to ngk spark plugs. I say upgrade because i didnt have to replace due to jb4. I did it because i heard they are better compared to stock. Yes, you might have to REPLACE yours because of the extra power from the jb4. But thats normal with any tune on any car. My suggestion and most peoples on here, when you need to replace or decied to upgrade just pay the little and get the ngk. After 1k on them. No issues.

[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...

[MARZPOPS]

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Some one please tell me these codes its showing i have about 3 correct? I get a half engine light anytime i accelerate hard, dont hear no turbos spooling either cars super slow !

[Jeff@TopGearSolutions]

Originally Posted by Spaceegrayy

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Some one please tell me these codes its showing i have about 3 correct? I get a half engine light anytime i accelerate hard, dont hear no turbos spooling either cars super slow !

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?

[MARZPOPS]

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?

Here is the link hopefully it works now, and you know what i have not checked and i got a code before for charge air pressure to low

[Jeff@TopGearSolutions]

Originally Posted by Spaceegrayy

Here is the link hopefully it works now, and you know what i have not checked and i got a code before for charge air pressure to low

All I see is a video of gauges moving around? Is that how you tell the codes? I never used those features on any tunes as I always had the Bav Tool (LOL).

What tune are you running and what other modifications and miles on the car?

[MARZPOPS]

Its jb4 code reader i have 7" fmic bov 45k

[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