fuel pump and misfires

[heist_tub]

So after a month of running Cobb AP my 2009 135i with 42k miles, I started getting some bad misfires. Codes pulled for 3 cylinders and a multiple cylinder misfire code. Also a fuel pump plausibility. I just had injectors and plugs replaced 1k miles ago. The dealership refused to replace the fuel pump because the fuel pump code is "normal" in BMW's. I told them to check my intake valves, so hoping for a walnut blast at least. Any other ideas on what it could be? When back to stock map the misfires go away, but the fuel pump code is still there. Maybe needs a pro tune to run properly instead of OTS? 91 octane is what is available here.

Oh and I was using stage 1 sport and stage 1 + FMIC. Both were just as bad. I have ER cp, BMS dci, and vrsf 5" fmic.

[bxsinster]

did they replace coils im in the same boat (cobb) except my coils were changed as well as plugs and injectors no more misfires.

[heist_tub]

Indeed they did not. I'll talk to them tomorrow. I doubt they will, they seem to do repairs on a "service engine" light basis. But eh worth a shot.

[bxsinster]

i have an 09 135i with exact same symptoms 1 day after cobb stage 1 install. and they put new plugs injectors and coils to fix the issue 5k miles later still good to go.

[heist_tub]

guess i need to check my coils. only thing left is coils. bmw here wouldn't replace my fuel pump because it hasn't completely crapped out yet. But already pulling codes for it.