[JayPichardo]

Originally Posted by evermire

I'd be open, but an interesting series of events over the last few days. I'm running map 2 btw on the JB4 with firmware v13. Last Friday at about 1100 total miles my check engine light came on. No noticeable difference in driving performance though, but when it didn't go away on its own I stopped by BMW and dropped it off for a look. I've taken my previous cars to the same dealership and SA with various mods and they never care or give me grief. I do disable the JB4 before dropping off, but I don't go through the headache of removal or any of that.

They call me after having it for a day (they were busy) and told me that the engine code was related to over boosting and A/F ratio variance. They say it's related to the 'flash' and that I need to actually remove it from the car and bring it back in for them to see if anything really happened. I'm calling BS on most of it, given that they wern't even able to correctly identify the JB4 in the first place, but I have no tool or way of checking G series fault codes (or clearing them) myself currently. The JB4 doesn't officially support this chasis yet. Anyways, kind of unsure what to do at this point given they noted it on my paperwork

For now it is disabled.

Most dealers have no clue what JB4 is.

[JamRWS6]

Originally Posted by JayPichardo

Most dealers have no clue what JB4 is.

Most of the techs know exactly what a JB4 is. If you are running one there just isn't a reason not to uninstall before bringing the car in. If you aren't going to uninstall you might as well go the flash tune route.

[gpdriver17]

Originally Posted by Fean07

Hi
I would be available for that if you still looking for somebody. I can be available this coming weekend. Let me know

Did this ever happen??

[chenry]

Originally Posted by gpdriver17

Did this ever happen??

Not yet

[PURE340i]

Air mass fault is normal some times when you're pushing higher levels of boost. I get it all the time even with a back-end-flash. Future reference don't take your car to the dealer with a JB4 plugged in.

[shawntech]

Considering installing my leftover jb4 from 340i, I scouted access thru firewall it's easy. Anyone have any logs on a m340i? Isn't discussed at all on Terry's site.

[TheBenchmark]

Mine will be installed this week. Terry said the Supra model is the correct jb4.

[iPetey]

Not sure if i did this right, but heres map 3 log data. Any pointers on how to log this stuff for analyzing is welcome.

[joes_m340]

Originally Posted by TheBenchmark

Mine will be installed this week. Terry said the Supra model is the correct jb4.

Why wouldn't Burger Tuning mention this? The Supra and M340 would be tuned differently, no?

I'd have to dig up the specifics, but the cars do have different parts (DP, Turbo). Someone correct me if I'm wrong.

[iPetey]

Originally Posted by TRK_RDY

Why wouldn't Burger Tuning mention this? The Supra and M340 would be tuned differently, no?

I'd have to dig up the specifics, but the cars do have different parts (DP, Turbo). Someone correct me if I'm wrong.

I said the same thing, because when i emailed BMS, Ando G told me the one i had was the right one. https://burgertuning.com/collections...oducts/b58-jb4

This is the model i have installed.

[iPetey]

Email's attached for reference

[rd.m340x]

Originally Posted by iPetey

I said the same thing, because when i emailed BMS, Ando G told me the one i had was the right one. https://burgertuning.com/collections...oducts/b58-jb4

This is the model i have installed.

Just wondering how things have been with the JB4 in your car, performance, reliability so far, more codes?, I just return my VW GTI lease which I had a JB1 for 3 years, zero issues and great performance upgrade.

I got me a M340i Xdrive 2 weeks ago, already thinking on getting a JB4 by the end of this month or next month by latest.

Thanks!

[jay94]

Originally Posted by riskmaker76

Can you post a log?
Curious to compare to my 440 mppsk jb4

Good day, can someone tell me if I'm doing right with jb4? I'm new to all this and using dragy time, I'm doing same time as stock car.
map3 and map6 attached

[Alexey]

Originally Posted by jay94

Good day, can someone tell me if I'm doing right with jb4? I'm new to all this and using dragy time, I'm doing same time as stock car.
map3 and map6 attached

You need n54tech.com

[riskmaker76]

Logs look perfect!

I rather look at the csv but can’t believe how much boost and timing it has

Far better than my 440 mppsk with jb4

How’s it feel ?

Originally Posted by jay94

Good day, can someone tell me if I'm doing right with jb4? I'm new to all this and using dragy time, I'm doing same time as stock car.
map3 and map6 attached

[PURE340i]

Originally Posted by evermire

I'd be open, but an interesting series of events over the last few days. I'm running map 2 btw on the JB4 with firmware v13. Last Friday at about 1100 total miles my check engine light came on. No noticeable difference in driving performance though, but when it didn't go away on its own I stopped by BMW and dropped it off for a look. I've taken my previous cars to the same dealership and SA with various mods and they never care or give me grief. I do disable the JB4 before dropping off, but I don't go through the headache of removal or any of that.

They call me after having it for a day (they were busy) and told me that the engine code was related to over boosting and A/F ratio variance. They say it's related to the 'flash' and that I need to actually remove it from the car and bring it back in for them to see if anything really happened. I'm calling BS on most of it, given that they wern't even able to correctly identify the JB4 in the first place, but I have no tool or way of checking G series fault codes (or clearing them) myself currently. The JB4 doesn't officially support this chasis yet. Anyways, kind of unsure what to do at this point given they noted it on my paperwork

For now it is disabled.

Whoever this is just fucked themselves. Next real warranty claim with this documented....they will trace back to it.

[M340i Pride]

Originally Posted by PURE340i

Whoever this is just fucked themselves. Next real warranty claim with this documented....they will trace back to it.

Yes indeed... It is prudent to take off any piggybacks when taking it to the dealership, no matter how long you knew or friendly you are with the SA. Technician could report it and leave it as a permanent record. Hopefully it could be worked out for him... Best of luck.

[37b]

This isn't me, but its relevant so I am posting it.

[iPetey]

Originally Posted by rd.m340x

Just wondering how things have been with the JB4 in your car, performance, reliability so far, more codes?, I just return my VW GTI lease which I had a JB1 for 3 years, zero issues and great performance upgrade.

I got me a M340i Xdrive 2 weeks ago, already thinking on getting a JB4 by the end of this month or next month by latest.

Thanks!

Everything's been great.. I'm almost at 5k miles with no issues, however i did need to add a quart of oil around 4k, which i saw many m340 owners have occur to them as well.

[PURE340i]

Originally Posted by iPetey

Everything's been great.. I'm almost at 5k miles with no issues, however i did need to add a quart of oil around 4k, which i saw many m340 owners have occur to them as well.

It might be the oil level sensor.

[Alexey]

[Alexey]