I have run into some weird problem...
I swapped out my blown motor from a month ago with a used motor I bought. I used all my old manifolds, fuel rails, water pump et cetera on this new core. I tried cranking it over and determined I am not getting fuel through my rails. The pump is definitely flowing because after loosening the clamp on the fuel line going to the first rail, the line shot off due to so much pressure building up So the fuel is there. The problem is at the FPR at the lower rail is suddenly not flowing at all (maybe it's clogged somehow?). I pulled it off the rail and determined nothing is flowing through it. I tried blowing through it both ways but I get nothing. How did this happen? My old motor ran fine (until it blew obviously) But even after it blew I was able to turn off the car, start it back up and limp it home. How did the FPR go bad after sitting for a few weeks?

I am running an aeromotive FPR on my return and a wlabro 255 pump. Am I able to skip this stock FPR on the rail and just run a line direct into the rail or would this cause flooding/rich conditions?

Please help! I need to get this thing on the road.

 

Unless this is a J-spec motor, the FPR is on the longer secondary (top) rail, not the short primary (bottom) rail. You probably hooked up the fuel hoses backwards. The FPR only flows in one direction. Make sure the FPR is connected to the return line, not the supply line from the fuel filter.

 

+1. I did this myself. A good indicator is that if you've been trying to crank it and it hasn't started, when you remove the fuel hoses one will give a little pop when it comes off and splash fuel.

 

My motor is a little weird... My old motor was not a jspec, yet I did have the PD on the upper rail, and my FPR on the bottom rail. This time around I found a replacement jspec motor. I am keeping my rails the same.

The fuel supply line feeds the primary (lower) rail correct? Then I have it hooked up to the secondary (upper) rail with the short line. From the end of the secondary rail I then have the return line to my aeromotive FPR then back to the tank. This is how it was before I blew the motor. Or unless I am having a brain fart and the fuel supply line fed the upper rail first and returned from the lower rail, but that can't work don't you want the primaries getting fuel first?

I'll mention again I pulled the FPR off the rail and tried blowing into BOTH ends and got no flow either way. Shouldn't I get some flow or does it need a very high PSI to open?

Also, I don't have any vacuum line feeding the FPR on the rail, is this bad? I am running a haltech e6k and I have no vac lines anywhere (except for wastegate actuator, boost gauge and BOV).

 

On my stock NA and the stock TII rails I've got now, it was in at the bottom and out at the top, just like you say. The primaries get fuel first. With the stock rat's nest it's hard to tell where the lines end up though, especially since there's enough length that it's possible to bend them wrong.

 

Have you tried pulling the fuel return line off and primering the fuel pump? See if fuel comes out from there. Since your running a haltech, check your fuel pump fuse and your injector fuse. Dont just look at the fuse, take them out and test them. It could be that the fuse is blown so the injectors arent opening.

 

Thanks for the responses. I have a gauge on my aeromotive FPR and we saw no pressure was building. We took the line off and primed the system and nothing came out. My pump does kick in to prime the system when I turn the key. Fuel was coming through the supply line but not getting into the rails. I'll go home and try putting my pule damper on my low rail, and the FPR on the high rail and see if that gets me going. Maybe I am *** backwards.

 

update!! My lines were backwards (i'm retarded). However, it's because I was confused about my opposite pulsation damper and the FPR. Oh well. After lots of cranking and back firing, she fired up and smoked.

 

Congrats! I'm looking forward to starting mine someday soon, too. Hopefully mine will fire up pretty easily too.