HELP! F-,150, V-6

Bought this truck from dealer with 221K on it, have 2 other F-150's but with in-line 6's that have over 300K on them. This is my first experience with a V-6.
Truck ran fine on initial drive out, then began a slight miss @ idle.
Gas consumption escalated very much!! Put on computer. Shows bad EGR valve & a miss on 2 cylinders. Exp. Mechanic bud says there's a sensor on exhaust to check the EGR valve & most of the time the EGR is OK but the sensor leads have burned away.
Anybody have any knowledge? Could this be causing the miss & poor mileage?

Missing and poor mileage can be caused by a bad coil, bad plug wires, bad spark plug, vacuum leaks, a bad sensor, or a bad sensor wire grounding out. Try a good tune-up FIRST(plugs, and wires). Also, check for vacuum leaks. Some of those little plastic tubes do wear out from heat and age. .

If this doesn't help, try replacing the coil (or coils, one at a time). If it still is acting up, then go for the sensor for the EGR valve, checking the wiring BEFORE replacing the sensor.

IMPORTANT: Be sure to clear the codes from the computer after each step, because if you leave them in you WILL NOT KNOW if you solved the problem. I know of a guy who failed to clear the computer codes, and after spending over $1500 changing parts, he still wasn't sure when the problem was cured. He finally had the code cleared and it never rose its ugly head again.