Fuel pressure regulators are easy.

1) remove 5 screws that hold fuel rail to intake. Takes about 5min.
2) disconnect fuel supply and return lines at fire wall. Takes 5 min to 30 min depending on how adept you are at taking those fuel connections appart.
3) remove fuel rail from injectors and lift it out.
4) using snap ring plyers remove fpr snap ring
5) wiggle up and out fpr.

Reverse proceedure to install

Shouldn't take over 1 hr. But still harder than a alternator.

 

So, sorry for resurrecting a years old thread but this appears to be closest to my particular situation, I've checked all of the things in the various 6.8L fuel pressure related threads and I'm running out of ideas...

I have a 1999 F350 6.8 V10 pickup with 155k miles. Back in August I was on a 150 mile trip and I noticed a power loss on a hill. It quickly went away but came back in October on a 50 mile trip so I looked into fixing it.
Since then, I have done the following in this order:
replaced fuel filter (no difference)
replaced fuel pump
replaced all 10 plugs and coil packs
cleaned mass air flow sensor and changed air filter
replaced fuel pressure regulator
changed one of the O2 sensors.

Originally I had no codes present, now I am getting codes for low fuel pressure on both banks. (this started after the filter and pump were changed) Everything since then has made no difference.

After changing the pump and filter, I went on another 150 mile trip in December. It ran great for the first 30 miles then lost power on a bridge (Rte 95 NH to Maine). I would have to put my foot to the floor to keep from losing too much speed and all of a sudden, whatever wasn't working miraculously recovered and the truck launches off like a rocket.. This would occur several times throughout the trip. When I got off the highway, it would idle very rough (like an old muscle car with a big cam) and I could smell fuel. I continued on my way, giving it heavy throttle and it would clear up and launch forward again, apparently fine. The trip home 2 days later went the same way..

Some history: I bought the truck in 2014 with 102k on it. Other than a driveway snowplow, it was never been a work horse (towed anything big/long distance, not a tow truck, not an RV, etc) so the engine really hasn't been stressed. One disclaimer I should make is that when I got it, the windshield did leak causing a bunch of electrical problems, but I fixed that leak about 5 years ago and have had no electrical issues since (until maybe now)

I am currently getting the low fuel pressure code for both rails and the computer shows a misfire on cylinder #2 and #10 (65 times on a less than 10 mile trip from the garage and around town, back to my house, and back to the garage)

I am running out of ideas here so any help you can give would be great,

Thanks
Ed