'04 Ford Explorer Won't Start... P0172 and P0175
I'm usually the one answering questions, but here I am asking! My aunt has a 2004 Ford Explorer Eddie Bauer, 4.0L V6, that won't start. I scanned it and it's showing P0172 and P0175, codes for rich mixture on banks 1 and 2.
I checked for spark on all 6 wires from the distributor/coil pack, and all 6 sparked. I am thinking this could be a fuel pump, but I'd like some insight here before I tell my cousin (who takes care of the truck) to do anything.
The engine cranks, but won't start. We got it started once, but it ran horribly at around 500 rpm for a couple seconds, then died. The fuel pressure regulator was just recently replaced to fix an issue of the truck stalling out, and my cousin tells me that he read somewhere that running it on a bad regulator for too long will foul up the spark plugs, which are also relatively new, probably a year old. I have yet to check the spark plugs, because my dad and uncle are telling me that it can't be, but you don't know until you check, right?
I do hear the fuel pump going when I turn the ignition on. At least I think it's the fuel pump, as it's more of an electronic sound than I'm used to with my cars.
So, am I on the right track here? Maybe a fuel pump or a clogged/bad injector? Or does this sound more along the lines of spark plugs or wires? Or even the coil pack?
