The initial post really sounded like an alt... but the new stuff doesn't really match that diagnosis. Have you checked for vacuum leaks? My truck was running poorly until it warmed up for a few weeks and it ended up being a rather sizable vacuum leak. That or some kind of sensor seems more likely given the change in performance between cold and warm. <img src="/forums/images/graemlins/confused.gif" alt="" />

Sean Strawmyer
Back and ready to rock...... crawl.

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