I will repost info from other thread/different site.

Ok heres the backstory and issue, thanks for checking in.
00
LS, 190k miles
The idle has been rough for a little while now, but moreso after I got a timing belt/water pump change last week. I got it back and it runs better, but the idle has gotten worse over the past week. I did the usual
clean IACV, replaced plugs, and was checking the cap and rotor, well the rotor screw backed out, and the rotor smashed into the lower left distro cap stud (cyl#1). so The screw was laying there, rotor bent, and cap tore up. I figured this was for sure my problem! I replaced cap/rotor/screw, cleaned the white dust crap, and it fired up a little better, but the miss is still there.
I also replaced the plug wires, and put in a new ignition coil this morning, with minor improvements. Any ideas?