Hi All,

I am a newbie to this forum and I am hoping that someone on here can help with a problem that I am having with my 1987 porsche 928 s4 (RHD) which I acquired recently. It is only firiing on 4cylinders 2 on each side. The distributor on the passenger side is not producing a spark. I have already checked leads. Swapped out the coil, distributor, rotor and leads from another 928.checked relays and also swapped out ignition module and ecu which did not make any difference. Also cleaned earthing points and am at a loss at this point as to what else could cause this. It has 120k and has not been driven in a while. Any help would be much appreciated.