just finished swapping out plugs. Broke 3 outta 8. ak_cowboy lisle tool came in very handy. cleaned MAF and throttle body too. put in sps-515 motorcraft plugs. i put motorcraft copper anti seize on threads and a little on bottom. i didn't change any boots or coils - no codes for misfires and they (boots) looked ok. happy to have it done. thanks again for the tool.