[Scrapper]

have you checked the timing? also pull plugs out and check the gap it should be under hood on gap. another thing you may want to check e-brake see if there working wright. do you no when the last time 0-2 sensors been changed? some more thing's i can think of is checking all vaccumme hoses. and run some seam foam threw your gas and make sure your air presure on your tires what your truck calls for and don't go by what it sais on tires run what it calls for on truck witch should be on drivers side door. and cat converter can be pluging up also.

good luck.....