V-10 Excursion missing; no code or pending code

And like I said earlier, some excursions do not monitor misfires. It all depends on the way the PCM is programmed which is dependent on what market the Excursion is destined for. My X doesn't have downstream O2's, monitor misfires or have an EGR system. It has a GVWR of 8900lbs, which is why in IL it doesn't have these things. Other states have there own requirements for emissions. Mine runs OBD1 software in the PCM.