misfire on#2 wen going 55 or od on on 1997 Ford F-150

have changd egr valv and relay

by in Hayesville, NC on June 16, 2013
3 answers
ANSWER by on June 17, 2013
Last GOOD tune up?? And the engine is? Different ignition systems!!
ANSWER by on June 17, 2013
scan codes and post so we can adv
ANSWER by on August 01, 2013
should have wires. probably water in #2 plug hole. did one last night same plug. blew out water, pulled plug and cleaned it. run ok.