I have a 2010 Ford F-150 with the 5.4 V8 and 206,000 miles that runs weird. I installed two new cats (one was stolen and the other was hollowed out) and a new bank one downstream o2 sensor. When I start it, it will run fine for a second before the rpms drop suddenly (sometimes it will stall but not always) and then steady out at the factory idle speed. When driving, it doesn't have the best throttle response and sounds rough. I have 6 codes, P0010, P0020, P0102, P0135, P0155, and P0443. Could bad 02 sensors or a bad maf sensor cause this? Any help will be greatly appreciated.
Wow! With all that mileage and all those codes they're actually could be dozens of different things causing them. So I would start from scratch by checking all the wiring to make sure somebody hasn't screwed them up. If they hollowed out cats, there's no saying what kind of stuff they disconnected or wiring they might have damaged. You can't find any wiring damage. I would reset the codes to zero, take it on a road test and see which codes popped up first, then analyze it from there. See my video fixing a car with multiple trouble codes. Scotty
