questions
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,873
Likes: 1
From: Phx, AZ
questions
I added two gauges to the truck, one mechanical fuel pressure under the hood and a glow shift electrical one. I used the upper drivers side port for the mechanical, and I used the lower passenger side for the one in the cab.... Any way the mechanical one reads 32psi?????? the one in the cab for some reason stays pegged at 100psi. (guessing I have a ground issue there) I am still messing with that one. But why is my FP so low at idle according to the gauge? Truck runs fine doesn't seem down on power. Only thing I can think of is the spring in the return when I put the FRx on was sure hard to get lined up right. Any thoughts?
Hotshot
Joined: Jan 2008
Posts: 13,144
Likes: 11
From: Rochdale MA
I added two gauges to the truck, one mechanical fuel pressure under the hood and a glow shift electrical one. I used the upper drivers side port for the mechanical, and I used the lower passenger side for the one in the cab.... Any way the mechanical one reads 32psi?????? the one in the cab for some reason stays pegged at 100psi. (guessing I have a ground issue there) I am still messing with that one. But why is my FP so low at idle according to the gauge? Truck runs fine doesn't seem down on power. Only thing I can think of is the spring in the return when I put the FRx on was sure hard to get lined up right. Any thoughts?
The two ports on the fuel bowl are pre and post filter. as long as the filter is clean and not overly gunked up there is no difference s to which port the sender should go into. There is a possibility that when you put your FRx on the spring was misaligned but the FRx is also designed to bump up the fuel pressure as well.
Is the mechanical gauge new or at least know to be good?
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,873
Likes: 1
From: Phx, AZ
Thanks megawatt, Ths is wha I have come up with so far. !st concern obviously is gettin my FP up. so drove truck 50 miles today to work, still drives as normal. But FP at idle under hood is 30psi. The gauge there is brand new kit from DI. as for the regulator....the litte oring around the plunger is a little chewed up. Could this cause m low FP? If so what is the part number for the internals on the regulator?
As for the glow shift....yeah I am thinking it is a bum gauge. Brand new but all wire up correctly and connentions all good. goes thru the normal start up sweeps etc. when key comes on. But needle goes to pegged and stays there???? Course they are closed today
The reason I am sing both ports and 2 auges is just this reason. In case one is wrong, I have a back up, also wen worki on truck I can see the FP from in or out of the cab withot having to move(when I get them working right) and also maybe see whe filter needs to be changed etc.
As for the glow shift....yeah I am thinking it is a bum gauge. Brand new but all wire up correctly and connentions all good. goes thru the normal start up sweeps etc. when key comes on. But needle goes to pegged and stays there???? Course they are closed today
The reason I am sing both ports and 2 auges is just this reason. In case one is wrong, I have a back up, also wen worki on truck I can see the FP from in or out of the cab withot having to move(when I get them working right) and also maybe see whe filter needs to be changed etc.
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,873
Likes: 1
From: Phx, AZ
HELP HELP HELP. Ok I took apart the FRx from the fuel bowl, spring was all sorts of twisted in there. Hopefully that solved the problem. But now I have a new one. the fuel return sleeve oring. (the fat one that holds the seal on the return line under the nut that connects to the reuglator housing) is no good. fuel spewing everywhere. I am stranded. anyone know if I can get one at napa. and what size is it???? Help please
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
I don't know if Napa has them but here is the sizes from Guzzle's page: Replacement O-rings for Ford Diesel Engines
Trending Topics
PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,039
Likes: 74
HELP HELP HELP. Ok I took apart the FRx from the fuel bowl, spring was all sorts of twisted in there. Hopefully that solved the problem. But now I have a new one. the fuel return sleeve oring. (the fat one that holds the seal on the return line under the nut that connects to the reuglator housing) is no good. fuel spewing everywhere. I am stranded. anyone know if I can get one at napa. and what size is it???? Help please
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Posting Guru
Joined: Mar 2009
Posts: 1,065
Likes: 0
From: Tiverton,RI
I'm a little late to this party, story of my life, but I had a fuel pressure issue as well, just got it fixed about an hour ago. My problem was that I was seeing 95 psi at idle when I got my new gauge hooked up (ISSPRO Performax's). At WOT it would only drop to 77-78 psi. Well the weather finally co-operated with my day off and I got a chance to check things out and found that the spring that sits into the FRX wasn't seated into the recess correctly, it was hooked on one of the little tabs, thus 'cranking' my fuel pressure. I guess that's what I get for not making sure it was right the first time. Anyway, it's all set now, idles right around 67-68 psi. I haven't driven it yet to see what I get for drop at WOT but it's already MUCH better.
On another note, Fire Rooster, I have both the o-ring and the little one for the plunger you can have. They are used but intact and didn't leak. I just changed my fuel bowl (thanks Jason, AKA Orezona) which is why I have the extras. I know it won't help you today but I could over night them to you in the morning, just PM me your address.
On another note, Fire Rooster, I have both the o-ring and the little one for the plunger you can have. They are used but intact and didn't leak. I just changed my fuel bowl (thanks Jason, AKA Orezona) which is why I have the extras. I know it won't help you today but I could over night them to you in the morning, just PM me your address.
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,873
Likes: 1
From: Phx, AZ
Update, Ford opened today. got the vibralock. So truck is running with n fuel leaks. I bought two. PlatinumPete is kind enough to overnight the FPR internals from his truck to me. So I will still be pulling it apart to try and solve the original low fuel pressure problem with a plunger and oring that are intact. (Big thanks Pete patiently waiting) But at least for now se is driveable and I am not stranded anymore.
PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,039
Likes: 74
Update, Ford opened today. got the vibralock. So truck is running with n fuel leaks. I bought two. PlatinumPete is kind enough to overnight the FPR internals from his truck to me. So I will still be pulling it apart to try and solve the original low fuel pressure problem with a plunger and oring that are intact. (Big thanks Pete patiently waiting) But at least for now se is driveable and I am not stranded anymore.
