[rrupert13]

I have a 2015 335i m sport and was having some problems running. At cold start, car idles ruff.(rpm’s drop then ramp up) If I do not let the car warm up, car wil buck and shake like hell. Car threw a MAF code and occasionally gives a drivetrain malfunction. The worst part of this is that when coming to a stop the car will occasionally stall. To put on that car shifts aggressively.
Mods
Mhd stage 2 plus with FBO
Xhp stage 3

[ooshnoo]

Have you cleaned the MAF sensor and throttle body? What did the codes say?

[rrupert13]

Too much air

[wishbone]

Originally Posted by ooshnoo

Have you cleaned the MAF sensor and throttle body? What did the codes say?

get some CRC MAF cleaner, give it a good soak and let it dry. Reset the code and see if that helps.

[ooshnoo]

Originally Posted by rrupert13

Too much air

So then start by cleaong the MAF sensor.

[rk2323]

Originally Posted by rrupert13

I have a 2015 335i m sport and was having some problems running. At cold start, car idles ruff.(rpm’s drop then ramp up) If I do not let the car warm up, car wil buck and shake like hell. Car threw a MAF code and occasionally gives a drivetrain malfunction. The worst part of this is that when coming to a stop the car will occasionally stall. To put on that car shifts aggressively.
Mods
Mhd stage 2 plus with FBO
Xhp stage 3

Do you have aftermarket intake? If so what intake?

[rrupert13]

Injen cold air intake

[rk2323]

Originally Posted by rrupert13

Injen cold air intake

I am having a similar issue on my ‘15 335 as well (im getting mixture too lean codes), if cleaning the maf hasnt worked for you. I would suggest trying on the stock intake if you have it and see if that changes anything.

Here is a link to my forum: https://f30.bimmerpost.com/forums/showthread.php?t=2093693

If i figure out a solution to my problem i will post it there.

[PETED678]

Sounds like MAF sensor have you taken it out and cleaned it? Any DTCs? Stock or aftermarket intake?

[rrupert13]

After market intake