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

have changd egr valv and relay

Asked by for the 1997 Ford F-150
Last GOOD tune up?? And the engine is? Different ignition systems!!
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Last GOOD tune up?? And the engine is? Different ignition systems!!
scan codes and post so we can adv
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.