On Friday I was driving around town and the truck started to run rough and the engine light started blinking. I knew one of the cyclenders was not firing. I got home and checked codes. It gave three codes: P0300 Random/Multiple cylinder misfire, P0301 Cylinder 1 misfire, and P0302 Cylinder 2 misfire. I swapped the 1 and 2 coils with positions 3 and 4. Then the error read bad coil number 3. I replace the coil 3 with a Denso coil from a big box automotive store and the truck drove great yesterday. Today the truck has skipped and hesitated in the lower RPMs but I am not getting any engine light so I figure no codes. I really am not sure where to start on this one. Any thoughts? Could another coil be starting to fail?
