94 s 10 4 cyl 5 speed. My truck has a possible miss fire between 25 and 45 mph at light throttle such as going through town. Ionly have to accelerate very little and it smooths out. It runs fine under normal or hard acceleration and tops out about 80 mph with no problems. It has no'check engine 'light and shows no code. Ihave 190,ooo miles uses no oil and gives 32 mpg . please give it your consideration. thanks very much Woody