Hi I have a 996 1998 3.4 Carrera, weird thing is happening, When I turn on the ignition and start the engine, it seems to misfire pop and all sorts, but if I turn off the ignition and turn it on again and start the car it seems to clear, I drove it yesterday and it drove fine until I had a misfire and the engine light came on, I put my snap on verus on it and came up with misfire on 4 5 and 6 so one bank. It also had 2 unidentified codes, with ne explanation, not sure what that is all about.
Any help please
Paul
Any help please
Paul