Dead miss in cylinder 2

SOURCE: ford f350 6.0L Turbo runs rough

Still sounds like there is a fuel issue. I would check the obvious. Check the Air filter and fuel filter and water seperator. Debris could have gotten into the new injector, which also could have upset the other injector. Get the exact code from the dealer your truck experianced.

SOURCE: engine code p0307 cylinder #7 misfire

It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.

SOURCE: rough running, erratic spark

Run a compression test on the cylinders.If reading is low on any drop a little engine oil into the pot. If compression rises you have compession ring problems. Remove all plugs before you try this and place leads away from engine.

SOURCE: Car is running rough, afetr spark plug change

make sure no fuel is down in the spark plug ports it will short out the spark

SOURCE: P0302 #2 cylinder miss fire code. Replaced plugs

I have a 1999 ford escort 2.0, its got a miss on cylinder 3 and 4. I changed the wires and the coil pack but its still missing. When scanned I get code p1506, p0303 and p0304