[Chrisred]

Hi, I keep getting ALL cylinder misfires on WOT only above 5000rpm.

Have RB turbos on 100% meth, FBO, upgraded LPFP.

Tried NGK 2 step and 1 step colder plugs and stock plugs. No change

New coils. Bimmerlife.

Injectors are index 12. Have replaced cylinders 1-2-3. Same results . Doesn't seem like I have issue there as no morning misfires due to leaks. And misfires are always on different cylinders or in ALL cylinders. Coded well and decouplers in place.

Carbon cleaning done as well.

Logged HPFP & LPFP with Trebila and everything is perfect. Logs are perfect until misfires.

Have stage 3+ spec clutch and flywheel.


No other codes. Just the misfires on several/All cylinders.

O2 sensors fairly new.

Any ideas.?? Anyone??