I just recently installed my Walbro Fuel Pump. My B&M Fuel Pressure gauge is reading 60psi+ and my B&M FPR cant even crank it down...so i put back my stock fpr and it was still at the same fuel psi, i cant figure it out. Also can a dirty fuel filter cause the needle to shake all up and down very rapidly?

 

This is a common problem with high volume and/or pressure fuel pumps. They tend to overwork your stock FPR. B&M is just like a stock one, but you can raise the pressure only, not lower it, you are still limited by how much fuel the stock regulator flows at minimum. Your best bet is to either use a 1:1 FPR like an Aeromotive, Paxson, etc. AEM's will work as well. You can also drill a very small relief hole into the regulator http://www.theoldone.com/articles/regulator but I found that it doesn't last and you end up having problems later down the road. You're better off getting a better FPR.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ryan819 &raquo;</TD></TR><TR><TD CLASS="quote">I just recently installed my Walbro Fuel Pump. My B&M Fuel Pressure gauge is reading 60psi+ and my B&M FPR cant even crank it down...so i put back my stock fpr and it was still at the same fuel psi, i cant figure it out. </TD></TR></TABLE>
Had the same problem with my Holley pump. I think they just flow to much fuel for the regulators to handle.

 

the problem is the FPR, i had the same problem, then got aem and now it is fine. The b&m FPR made my fuel pressure drop when i reved instead of go up. I give B&M a

 

i was running a walbro 255 and a b&m on my zc, and the high fuel pressure was cousing bad bogging and cels. it fouled my o2 as well.

 

how about my fuel pressure guage (screwed into the fuel filter)... is the fuel filter dirty or clogged because the needle goes up and down very rapidly

 

i have a 255lph pump and stock fpr on... fule pressure is 39 psi at idle, 42 with the hose off and pinched, rite within stock specs. i had a b&m fpr, and i couldnt get that thing to get anywhere close to stock pressure

 

i wonder whats wrong with mine? or am i one of the unlucky ones or the installation was wrong...

 

Do a search man, I had the same problems, mine was a dirty filter.