[Jackson54]

In the middle of a motor swap on my car. Car is a 2010 E90 M-Sport 335 N54. Donor motor came from a 2010 135i in a rear end accident. I had index 12's replaced by BMW 40k miles or so ago on my old motor, they were working perfectly. Donor motor also came with index 12's, I am looking to remove the donor motors index 12's and sell them and swap mine in from the old motor as I already know they are working perfectly and I believe they do not have as much mileage on them. Would this require coding of the injectors even though it is the same 6 injectors into the same 6 cylinder just into a different long block? Thanks.

[iqraceworks]

Coding takes into account the differences in the injector flow rates.....as long as the same injectors go back into the same cylinders, you are good to go.

[oilcrankinject]

Coding injectors is very simple. If you want a good running engine you will code new injectors.

[iqraceworks]

Originally Posted by hbdunejhgebn

Coding injectors is very simple. If you want a good running engine you will code new injectors.

He's going to take the injectors that are already coded in the DME, put them in a new motor with the same DME, put the same injectors back in the same cylinders.......so they will still be coded correctly

[Jackson54]

Originally Posted by iqraceworks

He's going to take the injectors that are already coded in the DME, put them in a new motor with the same DME, put the same injectors back in the same cylinders.......so they will still be coded correctly

The insight is greatly appreciated!