im having issues with cyl #1 misfire at idle only. So far i've swapped coil packs cyl to cyl, installed new coil packs, replaced injectors (this got rid of the other 2 & 3 misfire codes), adjusted valves, swapped spark plugs, egr seems to be clean had the intake apart no blockages, checked for vacuum leaks. compression test is the only thing i have left. any other ideas?

 

Check if the spark plug fires properly? You said you swapped them, but have you took the time to test them? A cheap inline spark plug tester can help you there. If the timing seems inconsistent then you can adjust the gap in the spark plug(s).

Also spark plug wire/lead could be an issue. Sometimes it's the simple things.