E30 Zone

hi, ive got a e36 2.5 m50 engine it was fine i give it new plugs and filters, oil etc. but the day after it ticks over fine but seem to be holding back and have a missfire when on load.ive Had a look over everything seems ok ive have a look at the coils and number 2 was down so bought a new 1 then number 6 went down so i put number 6 into 1 and 1 into 6 it ran fine for 5 mins then missfire come back, so i unpluged the coil one by one and it showed number 3 was down and number 1 and 6 was fine.
Has anyone had this before any common thing i should b looking for thanks guys

bad coil... had the same problem on 2 of my m50's. one of which already had a few replacement coils!

ive been offered a set of coils out of a p reg 328i will these fit my m50 325i.cheers

when i pulled the coil packs out the first time 3 of the plugs was covered in oil could this have something to do with it and does any1 know why it would be covered in oil. cheers

does any1 know why it would be covered in oil / The valve cover gasket has failed.