Ok I have a 98 5.0 explorer as my everyday driver. About a week ago it started to feel like it had a small miss in it ( no Check engine light ).....so I went ahead and put plugs and wires on it. After that it actually felt worse.....Then finally it did throw a code. So I wanted to drive it around and see what it felt like and I come home from a ride around the block and when I get out I noticed there is a very bright glow from the underbody.....I check it out and the first CAT off the passenger side manifold is glowing. So I Put a new OEM cat on it thinking it is plugged. So now after a ride with the new CAT it's no better the fist cat and the second cats for the drivers side are glowing now and it's throwing a nice blue flame out the second cat..... The codes are missfire for number 8 and number 5 cylinder.....(P0305 and P0308)......has anybody ever had anything like this happen and what could i maybe do to fix it. Im not trying to take it to the STEALERSHIP.....but it looks as that might be the case. Any suggestions?