OMFG... at my wits' end.

[psychlow]

Okay guys. I really need some help, because my car seems to violate the laws of physics.

Installed a Walbro 255LPH HP pump about two months ago with new 3/8'' fuel lines and a large fuel filter. Since then, the car hasn't started. So, I went through about a month of diagnostics on it trying to figure out what's wrong with it (don't get to work on it that often, and working on cars in an apartment complex sucks ass).

Anyway, finally narrowed it down, I believe, to a lack of fuel. At the same time I installed the pump, I installed an AFPR.

Everytime I run the pump and then uncap the system, I get fuel spraying all over the place and I lose about a shitload of fuel. So, I know the pump's working because I can hear it going and it stays pressurized until I decide to uncap the system and douse my engine bay with fuel, in spite of the paper towels I have wrapped around it.

So, I figure it's the AFPR. I uncap the system again, remove the AFPR from the rail, and pressurize the system again. Not one drop comes out of the AFPR. So, I bolt on my stock FPR. Still doesn't start. Remove the FPR from the rail, repressurize - same thing - when the system's pressurized, no fuel is getting past the FPR.

Then I try removing my fuel filter. Same thing, can't get fuel past the FPR. So, I disconnect the FPR, and I blow through the hose (turn your dirty minds off) with the rear line disconnected from the pump, and I easily blew out all the fuel through the line and can easily blow air through it.

So, now I'm stumped. I obviously have quite a bit of fuel pressure. Has ANYONE encountered a similar situation?

 

[IMMORTALSPYDER]

Maybe your injectors are clogged or stopped working.

 

[98RedGs]

Moved to problem diagnosis.

 

[psychlow]

Maybe your injectors are clogged or stopped working.

That's what I thought at first as well, however fuel is not making it into the rail since it can't get past the FPR.

 

[94TalonKid]

Correct me if im wrong, but doesn't the fuel come from the fuel pump, down under the car, then along the firewall to the fuel filter. Then it goes thru the fuel rail and into the FPR... then to the injectors, then to the engine. So your injectors could be clogged, and could be whats holding back all the fuel.

 

[psychlow]

Correct me if im wrong, but doesn't the fuel come from the fuel pump, down under the car, then along the firewall to the fuel filter. Then it goes thru the fuel rail and into the FPR... then to the injectors, then to the engine. So your injectors could be clogged, and could be whats holding back all the fuel.

Yep, you guys are all right. But it wasn't the injectors. Chalk this one up to one of the most bone-headed plays of all time.

I was thinking that the FPR worked sort of like an air pressure regulator - meaning the fuel feed line plugged into the FPR. Shows what I knew about fuel systems, I guess.

NOW I know that the FPR just bleeds the extra fuel pressure back to the tank. I knew that before (theoretically) but it took me almost a month to realize that I was going about it all wrong.

I pulled off the fuel filter and a section of the stock line, ran a hose between my hard line and the stock hard line, and she fired right up. I need to do a bit of work on the lines because I don't like how it's set up right now (sorta ghetto) but after that's done I'll finally be done with this mess.

Thanks for the help, guys.