bad miss engine codes.....what to do???
Ok guys so I got an 05 f150 with the 5.4 140k miles on it had the plugs changed at 100k and just put new high flow converters on it and it has a 4" spectre cold air intake now the problem is its throwing a p0420 and a p1000 its got new cats like I said and I just replaced the upstream o2 sensor and its still stumbling and missing bad at like 45 in overdrive when I give it gas and at full throttle not to mention I'm getting like 10 mpg I got a tuner I can data log it in real time data to check the o2 sensors and the coils I used to be a diesel mechanic and would rather not take it to the shop but I'm lost when it comes to reading this real time data can u guys help me out?

