since everyone on here gave me such helpful info.i figured id tell everyone the nightmare story working on my truck.ordered new motorcraft plugs no problem.put them in.ordered fuel filter,oil filter,tranny filter,coil packs and fuel injectors and all fluids .installed them no problem,got everything done turned the key and the nightmare begins spuddering and bucking,running like crap.long story short got "cheap" coil packs on e-bay.went againt my own rule "you get what you pay for".ordered good coil packs threw them in runs like a branded ape.ive learned a lesson the hard way.what you take out of it put back in it the same or equivelant.cheap coil packs caused me alot of headaches a little money and alot of time