I have a 97 ford explorer that gives a code of a cylinder 3 and 5 misfire it has new plugs coil pack and wires and it wont quit missing it has the 4.0 in it it dont have a double over head cam jjust a regular 4.0 motor what is wrong with it.I also need to know where the cabin filter is? It has a 189,000 miles on it.