Start it up. Let it idle and pull a coil pack connector ONE at a time and listen for a drop or change in RPM. the engine may also shake too. This is a good sign. It means that cylinder was working fine. And more on to the next. If you find one that does NOT change then you are missing either spark fuel or compression. Start by visually checking for spark. Narrow it down by 33%. After that then check for fuel and compression etc..