[sharkf90]

Hey everyone,

Recently I tuned my 2020 F90 to stage 2 using BM3. Prior to tuning I had downpipes installed along with step colder plugs to support the tune.

The issue/stalling occurs when I'm in third gear higher RPM. If I linger too long in one of the gears or if I launch it a certain way it will stall on me without any error message on the screen and I just have to hope for the best. Thankfully this has never happened at higher speeds or on the highway.

I have been able to datalog one of these stalls after about 30 mins of highway driving:

1st log is a launch from a complete deadstop:
https://www.bootmod3.net/log?id=6358...729b9ba1d4d3c8

2nd log is from a rolling pull where you can see the car stalls out at top of third gear:
https://www.bootmod3.net/log?id=6358...0b43fb5fff6e34

I made sure to log my fuel pump psi while doing these runs and the fuel pump does not seem to be the issue here.

Has anyone else experienced this issue with BM3 stage 2? Would I need to pair the stage 2 with a tcu tune as well to possibly fix this issue?

Protuningfreakz has been unresponsive to assist me after sending the datalogs which is why I'm asking here.

Any help or advice is appreciated!!

[pbonsalb]

Any codes show up with a high level scan tool? Did you do any customization prior to flashing? I have no trouble with BM3 Stage 2 OTS 93 on my 2018. I have read about people having to unlock ECU on their 2020 or newer but I don’t know the exact cutoff date in 2020. I think one person got the engine ECU to flash but not the trans ECU (the BM3 tune like any other flash tune modifies both since they work closely together — this modification is different from something like an XHP flash tune).

[sharkf90]

Originally Posted by pbonsalb

Any codes show up with a high level scan tool? Did you do any customization prior to flashing? I have no trouble with BM3 Stage 2 OTS 93 on my 2018. I have read about people having to unlock ECU on their 2020 or newer but I don’t know the exact cutoff date in 2020. I think one person got the engine ECU to flash but not the trans ECU (the BM3 tune like any other flash tune modifies both since they work closely together — this modification is different from something like an XHP flash tune).

I only have access to BM3’s DCT scanner and did not pick up anything. I did have to get a bench unlock to be able to tune my car. Would an XHP flash tune bypass the BM3s inability to tune the transmission? if not what do you mean that it’s different?

[EPTXM5]

Sharkf90. I sent u a pm on your spark plugs

[pbonsalb]

Originally Posted by sharkf90

Would an XHP flash tune bypass the BM3s inability to tune the transmission? if not what do you mean that it’s different?

I don’t know but XHP is different than what comes with an engine tune although an engine tune flashed both the engine and trans ECUs.

[IlyaUA]

Originally Posted by sharkf90

Hey everyone,

Recently I tuned my 2020 F90 to stage 2 using BM3. Prior to tuning I had downpipes installed along with step colder plugs to support the tune.

The issue/stalling occurs when I'm in third gear higher RPM. If I linger too long in one of the gears or if I launch it a certain way it will stall on me without any error message on the screen and I just have to hope for the best. Thankfully this has never happened at higher speeds or on the highway.

I have been able to datalog one of these stalls after about 30 mins of highway driving:

1st log is a launch from a complete deadstop:
https://www.bootmod3.net/log?id=6358...729b9ba1d4d3c8

2nd log is from a rolling pull where you can see the car stalls out at top of third gear:
https://www.bootmod3.net/log?id=6358...0b43fb5fff6e34

I made sure to log my fuel pump psi while doing these runs and the fuel pump does not seem to be the issue here.

Has anyone else experienced this issue with BM3 stage 2? Would I need to pair the stage 2 with a tcu tune as well to possibly fix this issue?

Protuningfreakz has been unresponsive to assist me after sending the datalogs which is why I'm asking here.

Any help or advice is appreciated!!

I don't know if you have addressed the issue already, but judging from these datalogs your car is overboosting and closing throttle and it has very high overboost. BM3 software is known to run on small overboost with small throttle closures, but here high turbo pressure could be the case.

[F90king]

Hello sharkf90 were you able to find the solution to this problem. I am currently having the same issue on my M5. Would really appreciate any help.