I have ordered a dongle and the miss started when I stopped and fueled up. any ideas?
I have a scanner but it doesn't always connect to the car. It always doe's to any other one.

 

Anyone know the voltage that comes from the ecu to the amplifier and then to the coil. I still have the same problem after replacing 2 ecu units still have p306 code and engine warning light. voltage at coil is 300mv and plug fires until it is installed. any ideas?