Hey everyone,
I have a 2006 F150 XLT 5.4L, & recently its been starting a little funny and idling rough. I got some check engine codes when it was idling rough one day, & it gave a misfire on cylinder 5 & 8, & a system too rich(bank 2) code. Just wanted to get some feedback in a direction to start before I start dumping money into the fix...
I really appreciate the help, Thanks....

 

The good thing is that you have missfire codes and that they are for just two cylinders as oppossed to an entire bank, therefore you can just focus on those two. How much mileage on your truck?

 

43,000 miles I now have a new code and its running rougher yet... Code is random/multiple cylinder misfire detected.... i was goind to start swapping coils plugs and injectors on 5 & 8 but not sure what to do now...

 

Anything leading up to the rough idle and codes? A hard hit, off roading, water under the hood?? Try taking some water in a spray bottle and spraying the coil and boots. Check for the trucks idle to react or for one of the components arcing against the heads.