[brokenBMW99]

My turbos were running weak after 150,000 miles so I decided to switch them out with stock Mitsubishi turbos from ecstuning. Mechanic replaced downpipes, turbos, belt, pulleys, actuator, and oil pan gasket for full transparency.

Car does not overboost on stock 0 MHD map. Hits 8.5 PSI with a target of 8 PSI. After we figured out it was overboosting on Stage 1+ and Stage 2+ we did the following below.

He recommended replacing the boost solenoids and boost sensor which we did and solved nothing. He replaced the tmap sensor from another 335i and it still was overboosting. I am sort of running out of options as to what it can be. I am hitting 19psi at 39.6% throttle. I will link the datazap below.

I am beginning to think the turbo install might have been done incorrectly. I cannot find much about overboosting with MHD tunes after a stock mitsubishi turbo and dp install on the forums. If anyone can help and fix my problem with the correct solution, I will offer a token of gratitude LOL. (actually)

https://datazap.me/u/broken335/log-1...=4-18&mark=146

[studio54]

Originally Posted by brokenBMW99

My turbos were running weak after 150,000 miles so I decided to switch them out with stock Mitsubishi turbos from ecstuning. Mechanic replaced downpipes, turbos, belt, pulleys, actuator, and oil pan gasket for full transparency.

Car does not overboost on stock 0 MHD map. Hits 8.5 PSI with a target of 8 PSI. After we figured out it was overboosting on Stage 1+ and Stage 2+ we did the following below.

He recommended replacing the boost solenoids and boost sensor which we did and solved nothing. He replaced the tmap sensor from another 335i and it still was overboosting. I am sort of running out of options as to what it can be. I am hitting 19psi at 39.6% throttle. I will link the datazap below.

I am beginning to think the turbo install might have been done incorrectly. I cannot find much about overboosting with MHD tunes after a stock mitsubishi turbo and dp install on the forums. If anyone can help and fix my problem with the correct solution, I will offer a token of gratitude LOL. (actually)

https://datazap.me/u/broken335/log-1...=4-18&mark=146

Your log link was displaying wrongly on my computer.

https://datazap.me/u/broken335/log-1...=0&data=4-5-21

This way it looks better, it's a bit overboosting, but not a lot, happen at midrange with V10 on mine aswell sometimes. Did you try any other map like V7 ?

[brokenBMW99]

Originally Posted by studio54

Your log link was displaying wrongly on my computer.

https://datazap.me/u/broken335/log-1...=0&data=4-5-21

This way it looks better, it's a bit overboosting, but not a lot, happen at midrange with V10 on mine aswell sometimes. Did you try any other map like V7 ?

I am only running MHD 2+, it also throws the code on Stage 1+ as well. Kinda unfamiliar with jb4. I am familiar with the maps however. Would installing jb4 fix the issue? I do have an appointment scheduled for a shop close by for a custom tune to see if that would fix it.

[studio54]

Originally Posted by brokenBMW99

I am only running MHD 2+, it also throws the code on Stage 1+ as well. Kinda unfamiliar with jb4. I am familiar with the maps however. Would installing jb4 fix the issue? I do have an appointment scheduled for a shop close by for a custom tune to see if that would fix it.

I am talking about map version 7 of MHD aswell (not JB4).

On your log, it's running MHD V10, you can try to flash version 7 (before flashing you can chose between version of MHD from V5 to V10).

[brokenBMW99]

Originally Posted by studio54

I am talking about map version 7 of MHD aswell (not JB4).

On your log, it's running MHD V10, you can try to flash version 7 (before flashing you can chose between version of MHD from V5 to V10).

My bad I did not even consider that. I was running V10, I will try out a different map tonight and see if it fixes it

[N54_e90]

It looks fine to me, boost targets are correct and ur only going 1 psi over which is normal.. probably because turbos are new... where did u get the Mitsubishi turbos? i heard they are pretty good in terms of price

[whyzee125]

He could've adjusted the wastegates a bit too tight or the car could need to adapt. Have you reset adaptations? Doesn't look like you're overboosting by a lot but it's odd that you're getting a code for it.

[iqraceworks]

Why didn't you order the Mitsubishi OEM turbos from FCP Euro? ......you would have got a lifetime warranty on them.