[Petrolhead3010]

So last month, I was going WOT to get onto the freeway. Car jitters, shakes, flashes "service engine" light, then loses most power. I pull codes, & get misfires in bank 2 (cyl 4, 5, & 6) as well as an o2 sensor code for bank 2. Fast forward past the holidays, i finally get to fixing it. I've changed the o2 sensor, all 6 coils & plugs, & all 6 injectors to -12s. After installing the injectors & hooking everything back up, I decide to clear the codes & fire up the car (just to see if I get a repeat of codes). Sure enough, minis the o2 sensor code, I get misfires in bank 2 again. No DME codes, btw. I'm at a loss. I called a mechanic, & he freaked out. He said I probably damaged the injectors because I didn't code them before starting the car, that I have to code them before even installing them. I'm unsure, as I've never done this before. I'm going to do a compression check when I get home, but is there anything else that could be causing the misfires? TIA

[NoQuarter]

If the car is not started what is the difference to coding them before screwing them in?

Without coding, the worse that would happen is poor fuel trims/running. It will not damage the injectors.

The mechanic you called is a fear monger.

[torrque]

So did the car run well after injectors being coded right ?

[2007BMW335i]

Partially educated guess here. I had the #5 mosfet go out on my DME (MSD80) It caused the entire bank (4,5,6) to misfire. It won't set the 30BA or 30BB until the transistor fails completely. I would get the mosfet transistors replaced.

I attached a picture of the transistors that need replaced, the part number I used is FDB14N30TM do some research to make sure before you buy any.

Fairly certain 2008 has the MSD80, check on that as well.