[ArmanHoss]

Just finished installing the JB4 on my 2016 340i, along with a autowerk catless DP and a AGP intake. At idle the car sounds like its choking, I tried both map 1 and 2 so far while driving around and it seemed fine, but whenever I park the car it would keep choking. Going to not drive for now until I find out whats wrong, don't want to damage it by accident. Any help would be greatly appreciated.

[chrisp3]

Not sure if the version can contribute but have you tried updating the firmware? I installed the JB4 on my buddies B48 but threw a drivetrain malfunction. Updated it and it resolved. Worth a try

[eluded]

All three at same time ? Isolate and debug and flash instead. It's 2020 and sure it's a crappy year but you can flash the ECU in 2020

[ArmanHoss]

Yeah I did them all together, wasn't too bad at all. I double checked everything and it's all properly installed, these are the following codes from JB4:
121533 boost pressure sensor, plausibility: Pressure upstream from throttle at motor stand
118002 Mixture ECU: mixture too rich
118001 Mixture ECU: mixture too lean
1F140A No Description Found

Edit: sorry also updated the firmware, didn't help

[Tkent818]

Originally Posted by ArmanHoss

Yeah I did them all together, wasn't too bad at all. I double checked everything and it's all properly installed, these are the following codes from JB4:
121533 boost pressure sensor, plausibility: Pressure upstream from throttle at motor stand
118002 Mixture ECU: mixture too rich
118001 Mixture ECU: mixture too lean
1F140A No Description Found

Edit: sorry also updated the firmware, didn't help

I don't want to get in a which tune is better debate, that's been done on here a million times. In my personal opinion and experience, a flash tune is the way to go and solves a ton of problems. I had a Jb4 on my 2014 335i before going with BM3 and the entire time I was chasing down lean codes, rich codes, AFR codes, etc. I was constantly put in map 4 and a bunch of posts later on n54 tech and I could never get it solved. Changed intake, changed gas, with no success. Flashed BM3 and never looked back, which I also now have on my 340. A lot of people can get them dialed in I guess but I wasn't one of them, when it worked it was good but just way too inconsistent. Good luck, I hope you get it solved but to me with all flash tune success now, it's the only way to go. Just my .2

[_N54]

Reach out to support@burgertuning.com

[about94ninjas]

I had a similar problem, car would misfire like crazy before dying out. It was a firmware issue with the JB4, it hadn't updated properly. Just did another update and everything was good. So I would try with that, and double check all your connections.

[Fuel-It!]

Post up a JB4 log that may shed light on the problem.

[ArmanHoss]

So the choking, shaking at idle was fixed by just removing the O2 sensor extension i bought for the DP, it was some amazon one and I guess it was messing with the computers.... anyways after that everything seems fine thank god. Heres a data log run in map 3 starting in 3rd gear.

[weehe126]

That's pretty useless, but shows your are pulling significant timing in cylinder 1.

[ArmanHoss]

It wouldn't let me upload the excel file onto here, anyway around that?

[Supr3me]

Go to datazap.me and create a free account. Upload your log to that website, make sure you're set to "public" not private, and share the link to the Log on that website here

[ArmanHoss]

Awesome thanks! Here's two logs I took, one from a standard pull at 3rd gear, and another from just driving around for a little.
https://datazap.me/u/armanhoss/log-1...log=0&data=1-4
https://datazap.me/u/armanhoss/log-1...log=0&data=1-4