costina

iTrader: (1)

Astra van only fires on 2 and 3 cylinders its had a new coilpack. but still its the same.
My question is anyone know how the coilpack is triggered? crank sensor, cam sensor?
Or has anyone come across and issue like this?
btw its been on a code reader which flaged up coilpack but as most of us know these readers on gives you the part thats not working and not the cause.
its for a mate so i haven't seen the car.

it has a lpg conversion and has the correct coilpack for this.

Any ideas and what to try wouldbe great searched the forums but no luck.