when u pulled the plugs what did they look like ? make sure u have a good connection with the coil harness. did u pull all the plugs and look at each ? make sure u use anit-seize compound on the plugs u might already but I am just making sure u do my friend <img src="/forums/images/graemlins/patriot.gif" alt="" />, as for the 0422 don't know right off the top of my head other then the 02 sensor I would disconnct it, clean the connector then reconnect it. ( any good electric connection spray should work )