fuel problem

[mattysr20]

ok this is my first post so lets see how this goes. First off ive searched all over but can find exactly what i need. So here is my issue..

Ok so about a week ago i drove my 91 240 with sr20det swap the car was running amazing as it always has i wasnt having any issues at all. The sr is all stock with...
apexi intake
fmic
hks boost cont
walbro fuel pump
hks hi flow turbo back exuast with megan down pipe.
So your normal mods.. anyways i drove from ohio to tennessee wich is about a 7 hour drive i stopped 2 times with no issues. Well when i got to tn i came too a stop sign and the car stalled out i didnt really pay much attention too is just figured it was the long drive. After starting the car back up i drove about another 2 or 3 miles to my moms house when i pulled up into the driveway i got it sideways a little lol then the car stalled again. I just went inside and left it i figured it needed too cool down soo about 2 hours later i get in the car it starts right up i drive about 1000 yards down the road as i turned into another road i got on it a little but not wide open as i shifted into second the car backfired then died well it was still running as i was gearing down but when i hit the gas nothing happened (motor was still running) no weird noises or anything no fluids leaking none of that.

Ok so after all that me and my buddy who is a ase mechanic for over 25 years looked the car over we could not get it to start back up. It crancked but wouldnt start we also descovered the fuel pump would not prime when the key was turned ...

Things i did...

new walbro
new fuel pump relay
checked fueses
checked power too all fuel sorces
changed fuel filter

I also had a buddy that knows alot about sr's and is also a mechanic for subaru look at it we tried everything we could with no change...

Things i think it could be are...

fpr
vapor lock
the harness too the fuel pump
another relay?
ecu?

So now im just looking for answers from more people has anyone had this issue before? any ideas on what it could be?

ANY and all help would be very needed as i need to get the car back too ohio thanks alot and if you need more info just ask THANK!!!

[KiLLeR2001]

Test the fuel pump relay, make sure it clicks. If it checks out fine its most likely a bad ECU. Happened to my SR one day, the ECU just decided to stop sending the signal for the fuel pump.

[mattysr20]

how do i check that? i put in a brand new relay

[KiLLeR2001]

Well if you jump the relay and hear the fuel pump priming than you know the pump is good. The only remaining factor is the ECU. When it happened to me I thought my fuel pump was bad so without testing anything I just replaced the pump and nothing changed. So I bought another ECU, swapped it out and problem solved.

[mattysr20]

Could it be ignitor plug? Spark plugs? Corect me if im wrong but when i turn the key the fuel pump should prime. Im just trying to get all possible causes for when i get to the car i wanna know what all i need to find.

[Briou]

I am having a similar problem to you...I have an sr swap with a walbro 255 and the AEM EMS 2..My issue is that the pump will not prime, but if I have the key in the on position, then pull the "ing switch" 30amp fuse and replace it the pump will kick on and prime up and I can start the car, but if I turn the car off and try to start it again I get no fuel pump....If you figure anything out let me know and I will do the same.

[mattysr20]

Ok cool im getting an ecu in a couple days im gonna switch that and hope its the issue

[mattysr20]

Bump need help bad still no luck.......
Changed all fuses and relays
Changed whole fuel pump assembly
Changed ecu...
Im out of ideas. Could it be a short somewhere or maybe ignitor plug?
Im so lost I just wanna drive my car!!!!

PLEASE HELP!!!!

[KiLLeR2001]

Is power and ground getting to the harness plug near the fuel pump?

At this point it sounds like bad wiring somewhere.

[mattysr20]

That's what I was thinking. Should I just test at the plug? I was thinking about just pulling the whole harness from the fuel pump to the front and checking all the wires.

[KiLLeR2001]

Test at the plug. If you get power, then the problem is on the fuel pump side of the harness. If you don't get power, then you have to work from that point on back until you find the problem. Make sure the harness plug itself isn't corroded and is making a solid connection.

[mattysr20]

Ok so I hardwired my fuel pump and now its working but still not starting. What should I check next?