My truck is misfiring and running rough at idle, but when you rev it it runs fine. If you drive it it has good power. I was even able to climb a small hill in it today in 2wd ( I couldn't resist ) . I have changed the ignition module and spark plugs, Bosh Platinums ( I changed them before the spark plug post ). How do I check the wires ( MSD wires). I plan on changing the rotor button and cap tomorrow. Help I' m trying to clear this up before I leave for Tellico Friday. I have a 302 with dura spark B. C. Q-jet with and Edelbrock manifold. Changing the timing didn't help.Thanks