I was driving my PA (non supercharged) down the street today when there was suddenly a huge drop in performance. Stopping at the next trafficlight i also noticed idle was horrible rough. It seems like it wont fire one or two cylinders.
I have the old model with the magnavox coilpack and replaced it early last year when one of the coils died. I bought an additional one as spare and switched it today, however this time there was no change at all. Sparkplugs seem to be ok and i hadn't much time to look after it today, since it was raining quite much but i will look into it again tomorrow and i am kind of stuck here what the problem may be. There is an additional electronicbox under the coilpack. Could this be cause of the problem? How can it be checked?