Problem with Chevrolet Blazer?

well i guss bonceing is motor misfireing. it qute the way you said it . anyway i would do a real good tune up plugs wers cap rotor an change thempture stwitch for comupter !!!! not for temp gadge . the temp switch that in the intake manfoulid not the head s! this compter temp stwitch contols the fule mixture . so car wont load up an misfire...