e85
O2 sensor issue
First one is idle
Second is 2 gear pull
BMW S4
Race
BMW S4
Qualify
Missfiring or breaking
Been fighting this missfire or idk what it is
Car brakes up from 3rd to 4th shift been happening ever since I went full E with reflex
Now I’m with aic
On 2nd set of index 12
3-5set of b58 spark plugs gapped to 0.22 with b58 coils
Did if of everything
Tuner can’t seem to help anymore