Originally Posted by ZXTT

First do a balance test. Pull the coil pack plugs, when you pull one and the RPM's do NOT change, that's your bad cylinder. Pull the injector connector and check for corrosion and clean. Ohm out the injector, it should be between 11-13 ohms, if not replace it. If it's ok the pull then coil pack and replace with a known good one. While replacing it pull the spark plug and compression test that cylinder.