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Message: <blockquote data-quote="pat247" data-source="post: 2074852" data-attributes="member: 2343">It sounds like you have replaced most/all components that could cause this problem. That said, I would do the complete idle relearn process to see if it corrects the problem. The relearn process takes 15-30 minutes and should not be rushed. This is how I do this procedure, turn off all accessories such as headlights, HAVAC and radio. Then disconnect the negative battery cable for at least 1 hour but over night is better. Reconnect the negative battery cable and start the truck without touching the throttle, let idle for 5-10 minutes then foot on brake put in gear(R) and hold for a minute then release brake and move a few feet brake shift to N wait a few seconds and shift to D release brake and move a few feet and brake again and shift into P. Repeat a few times then turn on accessories and make sure the AC is on max and repeat a few more times. Go for a short test drive and you're done.If still having issues I would recomend a fuel system cleaner such as BG 44K. Good luck</blockquote>