[ghostF32]

Hello everyone. So today I decided to tackle my tune up, a simple coil pack and plug swap on my 2014 435i. The car was running fine for the most part minus smelling a bit rich so I decided that new plugs and coils would be a safe move. Plugs ordered were OEM Bosch, Coils were from turner Motorsport. Installed everything correctly and made sure the plugs were gapped .030 (car is stock tune)started the car and it immediately threw a drive malfunction for cylinder 6 injector, checked the connections and found the plug came loose. Plugged it back in and cleared the codes and the car started fine and idled perfectly for 5 minutes. I started driving the car and at the second I started giving it throttle it began to buck and misfire. Limped it back home and ran the codes, cyl 3 misfire. Pulled the plug made sure the gap was set right tried again. Still missing. Through it could be the turner could so I swapped back, still missing. Tried putting the old plugs back and it’s still missing. I’ve literally tried everything I can think of and I can’t get this car back to running right. The plugs I pulled out were definitely ready to be replaced. I don’t understand how it could go from running relatively fine to this when I followed every step to a T and torqued everything to spec. At this point I’m about to take it to the local BMW shop.

Anyone have this problem before?

[gunnerxq]

Maybe turner coils are bad?

[scubajim]

Did you switch back the old plugs and coils back? Was it still misfiring? If so, I would suspect you inadvertently unplugged something. Make sure all the connectors around the area you were working look good. Push each one back in a little. Look past the plugs and coils.