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I've got a couple of friends that know this returnless system really well if this is what I think it is - and that is the same setup the 5.0 Explorer used. It works really really well for boosted motors. One of the guys actually converted his 5.0 out of an Explorer to COP. It's a really cool setup. They've been trying to talk me into converting my Mustang over to the Explorer system.... but mine works just fine. LOL
I've been going through my Buddy's online manuals, and I don't think it has a FPDM. There is not one listed in the Expy until 2005. I think it is indeed returnless, but uses the regulator to "dampen" pressure spikes, which probably explains why Moose found it listed as a damper. The 5.0 Explorer's use that same set-up.
EDIT: The Dorman part says 05-08 too...
Makes sense ha. Everything on this thing has been a pain. Its a bastard year IMO. By that I mean the amount of what Ford parts say fit and what actually fits and etc etc ha. Apparently it was not supposed to have aluminum block 4.6 but something at the casting plant f***** up. So it has aluminum block. Found 3 different variations of a plenum gasket. Passenger side motor mount was discontinued looked for it hell and high water. Had my neighbor who owns a body shop look had my buddy check out Ford's inventory. Found 3 that say they fit. But we're actually for a 2002 body style. Ended up I had to machine one at the shop in CNC mill. Has 2 knock sensors even though the book only shows one. There was some other stuff too. Never had such misfortune with putting a long Block in. Some other things I'm forgetting im sure ha
That's kind of what it looks like to me. That system looks nearly identical to the 5.0 Explorer's, and those were done in 2001. It's like Ford had a contract to fulfill sometimes, I swear. My truck has a bunch of bastardized stuff as well. It's an early 97.... all kinds of weird things on it. I bought Lightning headlights for it. I went to change them, and Ford changed the header panel mid-year and they mount differently. All kinds of swell stuff like that, lol.
That's kind of what it looks like to me. That system looks nearly identical to the 5.0 Explorer's, and those were done in 2001. It's like Ford had a contract to fulfill sometimes, I swear. My truck has a bunch of bastardized stuff as well. It's an early 97.... all kinds of weird things on it. I bought Lightning headlights for it. I went to change them, and Ford changed the header panel mid-year and they mount differently. All kinds of swell stuff like that, lol.
Well got new pump in. Took awhile fact everything was rusted to bits so replaced a load of hardware.
No longer seems to have hard starting problems. I'll have to check fuel pressure drop later. @ my parents garage left gague at home.
Took it up the road felt more responsive in town. Got on freeway and @ 3000ish booged out and threw p0301. Found the coil pack wasn't snapped correctly. Tweaked it around got it to snap. Took it back out and @ 3000 bogged out and threw p0300. Multiple random missfire. Did multiple test always thrw p0300 only now. Currently getting ready to do vacuum test to see if cats are plugged since O2 sensors are not easiest to get too to test.
Got rebuilt injectors got them all in Friday. Drove it for about 1.5 hrs still has powerloss at 3500-4000 rpm only at 40mph+. p0300 and p0174 was gone. But got a p0420 and p0430 came up 3 times after deleting. Drove it Saturday and the p0420 and p0430 were gone but it fell on its face again at 3500 getting on the on ramp and threw a p0300 and p0174 again. Im at a loss here now if anyone has any ideas? Going to bypass the cats because of p0420 and p0430 just for ****s and giggles at this point, plan on doing new exhaust anyways once the thing actually runs decent....
So despite the Vacuum test being good was indeed bad cats.
Idk if someone gutted the 1st cats or if they just totally burned out but this was all that was left. 2nd cat looked good but guessing all the material from the 1st one was blown into it.
Just finished doing all new exhaust from manifolds back and runs great
04-03-2016, 10:56 PM
