[60019113a]

I have a 2009 335xi with 115,000 miles. I bought it from the previous owner with FBO. The car is very slow but there are no codes when I scan it. I've scanned it both with MHD and a BMW compatible scanner. The car has a rough idle as well. I was thinking it may be leaky injectors but I am relatively new to cars and don't want to spend $2k+ on new index 12s just for it not to be the issue. Any help is appreciated!

-in addition to FBO it has a oil block off plate+aftermarket oil cooler and an aftermarket oil catch can.

[OMEGA412]

Are you leaving the engine running when you scan it?

[M-technik-3]

Suggest you find some one with INPA or ISTA to give it a very thorough scan. Thego from there. You mentioned MHD you might do a datalog from there and the turbo guys can give you some better pointers.

I am too much of a rookie when it comes to turbos. My n55 is on factory tune.

[60019113a]

Originally Posted by OMEGA412

Are you leaving the engine running when you scan it?

No I have the car in accessory mode. Should it be on?

[60019113a]

Originally Posted by M-technik-3

Suggest you find some one with INPA or ISTA to give it a very thorough scan. Thego from there. You mentioned MHD you might do a datalog from there and the turbo guys can give you some better pointers.

I am too much of a rookie when it comes to turbos. My n55 is on factory tune.

Okay, I will do that. Thanks

[OMEGA412]

Yeah car should be on or it could be clearing the code by itself, I had this happen with a boost leak. I would drive then get a check engine light, pull over shut my car off and check codes and have nothing. Then I tried the with the car on and it was stating a 30FF low boost