| Usually if it's something in the timing it will effect all the cylinders. I would start with the basics. Try swapping the spark plugs, coils and injectors around to different cylinders and see if the misfires follow. If you don't have any results then you may have to tear into the engine. A cylinder with 56psi is pretty low but I wouldn't go tearing into an engine without checking the above mentioned stuff first.
Also what happens if you clear the faults? Does it run better? It may have just been sporadic faults caused by bad gas or something like that.
__________________ 1998 Arctic Silver M3 Sedan
Mods: Full AA exhaust, CAI, 3.5" MAF, BB throttle, M50 manifold, 24# injectors, AA ltw flywheel/clutch, TMS pullies and some suspension mods.  |