[MohiAli]

Hi, Please help! read all the pointers and followed them.

I had engine management light come up whilst driving one day.

Had it diagnosed. Misfire Cylinder 2&3 P302 and P303.
To eliminate the error, changed the coils around to test swapped 1 with 2 and 3 with 4 but fault remained in the same cylinders 2&3.
Changed the spark plugs around, again fault remained on cylinder 2 & 3.
Got the garage to then swap injectors around, fault only came up only on Cylinder 3 so to be safe had all 4 injectors changed upgraded to Index 9 from Index 7. Fault has now returned to Cylinder 2 and 3! After so much time, money and effort back to square one.
Car now in limp mode and management light come up as fast as you clear it.

I did notice however, when engine on and i disconnect the 2nd and 3rd coil (1 at a time) the engine carries on running but if i do the same with 1 and 4 engine almost cuts out. Not sure if that means anything to anyone.

Should I change all spark plugs and coils also or would that be a waste of time and funds?

Please can someone assist a fellow Bimmer driver in distress??