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I am going to tackle this too high fuel pressure issue once and for all. I have the FRx and after high fuel pressure for too long, I ordered and installed a full FPR rebuild kit and installed it last Spring.
It was a kit like this:
But the poppet has a hollow/grooved inside of the head. The head of it is hollow with the open channel facing the smaller end.
The poppet seal is a "hat" shape, not just a taper.
Does anyone have pics of how that assembly is supposed to look, with all the pieces and parts properly aligned and assembled?
As dumb as it would make me look, I must consider the possibility that I have something assembled incorrectly
I'm okay being "dumb" and needing correction. but I don't want to be stupid and not ask about it :P LOL
Yes, new seal should look like the one on the right. Old, worn out seal is on the left.
The bent spring is going to make it hard to get things aligned a bit too I would think.
The pic and spring were before FRx and before the rebuild kit
If I put it in that orientation, it will slide up inside the hollow poppet head. It doesn't have a second surface to sit on, the head is hollow.
Should I just slide it up in the head? Will the taper still seal? I don't remember how much the tapered seal would protrude beyond the inside edge of the head, but IIRC it didn't seem to be right....
Almost like a backing oring in the hollow groove of the head would be better?
I know I have mentioned this in the past and you said you checked it, but when putting everything together the hard line that goes into the FPR was out maybe 1/4" and caused a 100 PSI reading on my gauge. The line was in enough to not cause a leak and if I had not had the gauge installed, I would have thought everything was fine. Luckily it was the first thing I checked and when I removed the nut, I could tell the line was not seated all the way when going to move it out. Re-inserted the line and screwed down the nut, this fixed my high pressure issue.
I know I have mentioned this in the past and you said you checked it, but when putting everything together the hard line that goes into the FPR was out maybe 1/4" and caused a 100 PSI reading on my gauge. The line was in enough to not cause a leak and if I had not had the gauge installed, I would have thought everything was fine. Luckily it was the first thing I checked and when I removed the nut, I could tell the line was not seated all the way when going to move it out. Re-inserted the line and screwed down the nut, this fixed my high pressure issue.
Thank you for the link (again )
You're bottoming out the return line in the FRx, right?
I will be blowing some air through it to check for blockage/restriction, too.
I do NOT have the FRx. I have the OEM FPR mounted to the driver side of the fuel bowl. It was surprised that the tube being 1/4" off was sealing properly, but causing 100 PSI.
I do NOT have the FRx. I have the OEM FPR mounted to the driver side of the fuel bowl. It was surprised that the tube being 1/4" off was sealing properly, but causing 100 PSI.
Yeah, the sealing method is a bit...odd. Uses the Parker sleeves as backers for the flare and compression nut.
I'm even betting that if I have something blocking the return line, it will be a piece of the old Parker sleeves, LOL.
I'll pull the line and reset, making sure I bottom out the return line.
For the longest time I thought that was the supply line and it regulated on the opposite end of the FPR
But it makes more sense to me now, the PROPER way LOL.
I'll get it, one way or the other.
I appreciate all the help and info. Like many things, it is simple after you've figured it out or have the experience
The plan for today is refilling the HPOP on the Excursion, reconnecting all the wiring, and troubleshooting the fuel pressure issues. It will have air in the HPOP oil again from replacing the IPR. I will also replace the ICP and then try to run it- see if there is any improvement just from the IPR and ICP replacements.
My replacement injector connector arrives later in the week and will have to wait- unless I find a suitable donor before then
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