hi guys, i have a 1994 e30 316i touring i am looking for some help with ,it has a misfire at 85mph plus the rev counter does'nt work when it is at 85mph the rev counter shoots up to between 5 and 6 rpm , i have changed plugs,dis cap,leads , rotar arm, but its still there ,there is plenty compression , timing is bang on aswell ,i know the speed limit is 70 but i just wanted to see how it went,i dont drive at this speed , can anyone help please cheers george .