[jeremyn099]

I really hope someone can help with this.

My 1995 A8 has developed a misfire. The fault code comes up with cylinder 5. I have checked the compression, changed the plugs, the coil packs and the ignition amplifier module. Each time the fault codes disappear and the car will run clean for a short while, then the problem reoccurs. It is right across the rev range and as the cat light will come on when the misfire occurs, I am guessing the car is still fuelling so it must be an ignition, rather than an injector problem.

Any suggestions would be very gratefully accepted.