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I have a 2001 F150 4x4 5.4L and I have been having some engine problems and I recently replaced my #6 Cylinder Coil Pak and its still sluggish. what else my be wrong
no, I didnt check the plug when I changed the plug, a mechanic told me to put the #no 6 cylinder to the #no 5 cylinder and see if their is any difference. I told him their would be a difference. So you think that the injector may be at fault or even the plugs?
