The_96_RS

Hello All, I have a 96 RS and i replaced the motor a year ago with a new Marshal motor after i hit the 200k mark on the origianl motor (fried all the rings and gaskets ended up with milkshake and changed out all the affected parts in the immediate system engine hoses radiator...). yet now, I am having a number 5 misfire that will not go away. compression test showed no issues... plugs are new wires and coil packs all switched around and still occurring just on the #5... changed the module under the coil packs and it improved the issue but still occurring while im on the parkway or at a light but not while accelerating... car rides really nice and smooth otherwise.... fuel injectors are new as well. i read through the misfire mystery posts and i am still left with the problem... any help would be apprciated