How do you shim the fuel pressure regulator? What do the shims look like and where you you purchase them?


Thanks, Krokus

 

The "shim" is actually a BB...shot out of a BB gun. You shim the spring in the FPR to put out 60-65 psi of fuel pressure. If i am correct..

 

Thanks. Sounds simple enough. I'll give it a try next oil change.

 

Shimming the fitting with a 3/16 spacer behind the spring in the fuel regulator. This is located on the right hand side of the fuel filter. You will see a 3/4 brass nut there. The spring is inside there. Shimming will raise the fuel pressure and often give you a worthwhile increase in power and no one that I can recall has reported higher fuel consumption.

 

Is this a mod someone would do with stock injectors and 250,000 miles on the engine? Except for a new downpipe and an air intake this thing is bone stock. Being a 5 Speed the truck is very slow off the line and doesn't come alive until 3rd gear. I'm looking for a little more poop!

 

i love this mod its easy to do

 

i did this and i didnt notice any power increase but the truck starts better

 

im looking for the same answer.. Anyone?

 

You will not see any HP gain with shimming the FPR, just a bit easier starting and a little smoother idle.

 

i did it on my old powerstroke and didn't notice any difference at all.
it is a quick and easy mod tho so give it a try and see what happens.