more fuel
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
the fuel pressure regulator shim just allows you to run larger injectors and chips that need more fuel. other wise shimming your FPR will only allow the truck to run slightly more efficiently, but that's all you will get. no noticable power increase..
Logistics Pro
Joined: Oct 2008
Posts: 4,818
Likes: 1
From: Avilla, IN
Trending Topics
Junior User
Joined: Sep 2007
Posts: 86
Likes: 0
From: Kissimmee FL.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
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
Elder User
Joined: Dec 2008
Posts: 657
Likes: 0
From: Ocala
Its what people do if your fuel pressure is low 30-40psi, it can boost it to where it needs to be. You dont wanna go over 70 from what I hear. There is a schrader valve on the side of the FPR thats attached to the filter housing, check your pressure there. If it is low you can put a standard BB under the spring inside the FPR. Dale at Tymar strongly recomended against doing this, told me "If the pressure is low, there is a reason behind it. Fix the problem don't mask it." But a lot of guys do it everyday, I havent heard anything negative about it yet, other than that quote.