Changed plugs and wires... miss got worse?
Hey guys, working on my 1997 ranger 4.0... I had a slight shake on warm idle before we started here. Replaced fuel filter, air filter, plugs and wires... thought may be at first the problem was the new plugs I put in, so pulled the champion platinums back out and put in some basic autolite plugs. (also autolite wires). The miss now almost makes it undriveable. When it is running (idle) and I pull the plug wire for #6 off of the coil no change in how it runs. Check engine light is on, and has intermittently been flashing. Took it to autozone to use the scan tool and it was giving me misfire #5, #6, and lean bank 2... any help here? The guy at autozone is jumping to conclusions about head gasket failure and all kinds of other stuff, I'm really hoping its something more simple than that. Possibly EGR sticking, or just a fuel problem... Let me know if anyone has any ideas. Thanks