[DavidTerrell]

my 96 3.0 has developed a simmilar problem. After changing the catalitic converter at about 90 000 miles. I did a full tune up. Changing plugs, cables, etc, but hen after a couple of week this missfire code appeared. I took it to the mechanic and tried, nothing apperar to be wrong so they clear the computer. Three week later again, and again the guys at the garage could find anything wrong. Today, 6 week later, the check engine came on. Have any ideas for me to follow? Thanks so much.