ok this is crazy, so after replacing the FPR and checking each injector and the spider assambly, while the pressure was dropping, for leaks I could not find any anything. Then I hooked up a hose to the fuel line and pumped about 60PSI of air against the fuel pump to check the check valve and then clamping the hose and it did not leak!!!So what does that mean?????????
If that much gas was bleeding from an outside line on the car frame I would smell it right?. So is there some kind of a check valve inside the spider unit? Because this is the only way I could be loosing gas!!!!!Help!!!this is annoying. Thanks for the help.

 

The FPR is responsible for holding pressure at the fuel rail. The only other place that it could leak inside the plenum is the injectors themselves either at the seal to the injector body or out the tip.

What do you mean when you say that you clamped the hose? Where did you clamp it? When you removed the clamp, did it bleed down? Do you have any pictures of this arrangement?

 

I guess I just don't understand what prevents the fuel from going from the inlet hole to the outlet hole on the spider unit. Wouldn't the fuel go through the less resistance path?Why try to leak through the injectors when it can exit the outlet line?I guess I don't know what goes inside the spider unit.I have read other threads and I am pretty sure I know how the whole system works, except the spider unit.

So for your question. The way I tested the check valve on the pump was by hooking up a rubber hose to the inlet line and then pumping AIR until I got like 50 psi(did not want to go to high afraid of breaking the pump) and then clamping the rubber hose and seeing if the pressure gauge went down and it did not. So this system only had the pump, the fuel filter, and the fuel line all the way to the schrader valve.