My b18 is running a little rough. There isn't any nocks or pings, but the engine shakes and its a little noisy. When I checked my spark plugs I noticed oil dripping down the threads of the plugs. Im guessing that its a leak in my valve cover gasket. Does any one know if that could be causing my engine to run rough? My 92 seemed way faster than this 94. Can someone please give me some advice to of what to replace on my car to get it running smooth again? I know this is not how a b18 should running.