7.3 fuel return relief valve?
Thread Starter
|
Freshman User
Joined: Jan 2008
Posts: 44
Likes: 0
7.3 fuel return relief valve?
Wondering if anyone has dealt with this issue?
2000 SD that I have installed the Airdog Raptor fuel pump that was set to about 20 psi that is in series with the 60 psi OEM that equals about 80 psi give or take.
I have a gauge installed near the fuel bowl to the supply pressure that I can monitor in the cab and at times I have seen this pressure rise to 100 or more.
I lost pressure yesterday and after confirming that my fuel pumps were working correctly and still could not build anymore than 20 to 40 PSI I decided to look else where.
My question is: does anybody know if where the return line leaves the fuel bowl is two torx head bolts that attach the connector to the fuel line. Inside the connector is what I think could be a relief valve that I may have blown due to over pressure. Just wondering if some body out there can confirm this and if so do you know what this pre-set pressure may be if it is a releif valve? If it is a relief can it be re-set or do I need to aquire a new one?
Thanks, Kevin
2000 SD that I have installed the Airdog Raptor fuel pump that was set to about 20 psi that is in series with the 60 psi OEM that equals about 80 psi give or take.
I have a gauge installed near the fuel bowl to the supply pressure that I can monitor in the cab and at times I have seen this pressure rise to 100 or more.
I lost pressure yesterday and after confirming that my fuel pumps were working correctly and still could not build anymore than 20 to 40 PSI I decided to look else where.
My question is: does anybody know if where the return line leaves the fuel bowl is two torx head bolts that attach the connector to the fuel line. Inside the connector is what I think could be a relief valve that I may have blown due to over pressure. Just wondering if some body out there can confirm this and if so do you know what this pre-set pressure may be if it is a releif valve? If it is a relief can it be re-set or do I need to aquire a new one?
Thanks, Kevin
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
The rubber seat on the poppet (brass part) in the fuel presssure regulator may be damaged and keeping the poppet from seating. The spring tension adjusts the the fuel pressure when it is working properly. Stock pressure is usually ~60 psi.
Thread Starter
|
Freshman User
Joined: Jan 2008
Posts: 44
Likes: 0
Do you know what the pressure is set for on this spring? My guess is somewhere around 80 to 100? Next question is does anyone sell a spring that would allow a higher pressure in the fuel bowl? I would like to maintain about 100 to 120 psi in the bowl.
Kevin
Kevin
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
Stock fuel pressure is ~60 (+/- 5 psi). I wouldn't recommend running pressures that high (100+) with a stock fuel bowl. You are increasing the chance for leaks from the lid gasket. IIRC, Gillett Diesel offers a spring that will put you in the 100 psi range, but IMHO that much pressure is overkill. I am running 62 psi with more than enough volume from my Walbro GSL392 pump to feed my engine to over 450 rwhp. I would recommend larger fuel lines with a regulated return over more pressure. I have seen the most gains in hp and torque with these upgrades as compared to the stock delivery system.
Posting Guru
Joined: Mar 2011
Posts: 1,037
Likes: 0
From: Florida
Cargo Master
Joined: May 2010
Posts: 3,047
Likes: 10
From: Snohomish, WA
You should have saved yourself some money and got the kit Roland posted above. It is $60.00 and is the kit you just ordered. It is the rebuild kit for the fuel pressure regulator. Diesel O-Rings.com and Riffraff stock them.
Riffraff Diesel: Fuel Pressure Relief Rebuild Kit
Replacement O-rings for Ford Diesel Engines
Riffraff Diesel: Fuel Pressure Relief Rebuild Kit
Replacement O-rings for Ford Diesel Engines
Trending Topics
Thread Starter
|
Freshman User
Joined: Jan 2008
Posts: 44
Likes: 0
Trust me- If I had not been a couple hundred miles from home and needed it now I would have with ease and now that I know this could be a problem and with the higher pressure I run I think a spare in the glove box is a must!!
Kevin
Kevin
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Freshman User
Joined: Apr 2011
Posts: 26
Likes: 0
From: Norway
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Stock fuel pressure is ~60 (+/- 5 psi). I wouldn't recommend running pressures that high (100+) with a stock fuel bowl. You are increasing the chance for leaks from the lid gasket. IIRC, Gillett Diesel offers a spring that will put you in the 100 psi range, but IMHO that much pressure is overkill. I am running 62 psi with more than enough volume from my Walbro GSL392 pump to feed my engine to over 450 rwhp. I would recommend larger fuel lines with a regulated return over more pressure. I have seen the most gains in hp and torque with these upgrades as compared to the stock delivery system.
Thread
Thread Starter
Forum
Replies
Last Post
