[Ryder6foottoo]

So I have had my 135i for about 2 years now and for the first year it was flawless.

Me being ridiculous I decided to go all out last year.
I went FBO+

Charge pipe
Catless downpipes
5" intercooler
DCI
MHD 2+ tune

PLUS
LWFW
Short Shifter
Stage 3 clutch
Quick release wheel
And other small things

SO HERES THE REAL PROBLEM

I was going down the highway and minding my own business. Decided to mess around and popped it up to about 6000rpm.

Well that apparently was a terrible idea. Car immediately went into limp mode and stayed there for days. Checked the code and it was for a lean bank 1 and multiple cylinder misfire.

I decided to take it to an unnamed shop.
They told me it was my ECU.

So I had it replaced. Problem was better. But not fixed.

So I took it back. They told me it was my index 09 injectors.

Okay then. Replaced with index 12.
Problem got worse.

They told me it was potentially a plug or wire issue.
Okay no problem I guess.

Replaced with Precision Moterwerks Coilpacks and new plugs.

Problem continued.

Took it back AGAIN for some reason.
THEY TOLD ME IT WAS MY ECU AGAIN.

For some reason I let them "recode my ECU"
THE PROBLEM GOT SO MUCH WORSE I AM GETTING ABOUT .3MPG RIGHT NOW.

Oh you read that right. I said . 0 3. NOT EVEN 1MPG

So I know for sure this means there's a stuck injector.

But this problem was never there before.


PLEASE SOMEONE PLEASE HELP ME FIGURE OUT WHATS WRONG WITH MY CAR.

I haven't properly driven it in almost a year. I am giving up and I don't want to. I don't know what else to do.

Someone please tell me there's someone with the intelligence to help me figure out what's going on.