'06 Ranger XL 3.0 loses power on hills
My '06 Ranger 3.0 was losing power on hills a few months ago. I replaced the rear catalytic converter and was able to maintain speed on hills again. However, the check engine light came back on and, over the course of a few more months, it began losing power on hills again. I paid the Ford dealership $130 to do a full diagnosis. Their response was that the pre-converters were clogged. So, I replaced them [$460], which didn't change a thing.
Anyone else with this problem had success in fixing it? I'm thinking of a few things:
* I heard there's sometimes a problem with valves receding into the head
* EGR valve clogged (but think I read 03-later models don't have one)
* O2 sensors
* low fuel pressure
2006 Ford Ranger