Malone Tune 2009 E70 First post

[Waykooljr]

I just purchased a 2009 X5 E70 with 84k.

I also have a 2009 Jetta TDI w/6speed manual trans. I did the full Malone 2.0 tuning and complete Rawtek exhaust turbo back and full delete myself. Completely transformed my car and I hit 53.2 mpg (my record) I average 48.6 at 75 mph when I drive steady without a heavy foot.

I would like to do this to my 2009 X5 35d. I have access to a full shop and auto lift. Wrenching does not scare me. I have also built three dodge cummins projects, never touched a BMW (except my 1957 BMW Isetta 300). I am contemplating a Malone stage 2 and full exhaust replacement with complete delete package.
I have a few questions for those who have gone before me...
Do I need a trans tune? Has anyone had issues from the full delete and tuning? I am getting turbo under boost code when I really get on the throttle. When I stop and turn it off and back on it goes away and it runs fine. it comes back if I really romp on it. I recently took the X5 on a 4 hour 80 mph drive @ 25.4 mpg tank to tank with no issues. The DPF light does not come on when I get the under boost code. Its a generic P0299 code

This is my first post so please be patient lol I tried searching for threads on this topic and there is a lot of threads and opinions! lol

[crystalworks]

Before doing any modding, sort your low boost pressure code. Also, get a BMW specific code reader. You could have other codes in addition to that one, plus other stored codes that might direct you to the culprit. Chasing P-codes from regular OBD2 scanners on a BMW is like trying to catch a greased pig.

No experience with the deletes or tunes, but others will chime in for that.

[Waykooljr]

Do you have a recommendation for a BMW tuner? I will go purchase one for sure. Thank you!

[crystalworks]

Originally Posted by Waykooljr

Do you have a recommendation for a BMW tuner? I will go purchase one for sure. Thank you!

Foxwell NT520 Pro is a good one. ~$130 and will do 95% of what you could want or need to do. More than a code reader, will reset batteries, modules, show live data, etc.

[ard]

Originally Posted by crystalworks

Before doing any modding, sort your low boost pressure code.

This is SOOOO true. Any car, any marque.


Sometimes people think "im taking out that stuff so who cares?"


The real issue is that the universe of knowledge and troubleshooting is in cars that DO NOT have a Malone tune. Plus, figuring what was due to a mod versus what was do to an underlying problem.....It just gets much much harder.


agree on the foxwell, they have a few- as long as it has the BMW SW, should be good

[Waykooljr]

I ordered the Foxwell 530. I'm sure i'll be back with questions once I scan the car with a proper scanner/reader. Thanks you guys so far!

[Waykooljr]

Found these 2 codes with my new Foxwell 530. 429A DDE: Boost-Pressure control, low-pressure stage, control deviation.

4D03 DDE: Exhaust backpressure sensor.

Does this mean my sensor is bad? Has anyone dealt with this before?

[TriX5]

Congrats on the new chariot. Yours is the same age as mine though you're at half the mileage. The exhaust back pressure code comes up a lot in conjunction with other problems. I would try replacing the sensor but you might find that is merely a symptom, not a cause. Check the vacuum lines that are on top of the turbo in the heat shield that is clipped over them with two push buttons. My vac lines were very bad in that section. A smoke test might be in order as well.

Good luck with the trouble shooting!

[Waykooljr]

Will do! Thank you!

[sunny_j]

Sensor tube to banjo bolt is probably clogged