Everything is buttoned up but it wont run, fuel problem, give me your ideas

[GreenFish]

ok, everything is wired and ready to go but it doesnt run. I Have a fuel issues as if I spray some starting fluid in the manifold it will run, and actually idles nicely for about 8-10 seconds before running out of fuel.

I've got a brand new tanks inc tank, with the in tank walboro pump. I'm using an aeromotive pressure regulator and checked to make sure I had the right spring in it. I can't adjust fuel pressure because it bleeds down when the pump is off.

One thing of note. When I first sorted everything yesterday and went to get it going the pump had a much smoother higher frequency sound to it than it does now. I messed with some settings but did not do a good job of documenting what i did. Now it sounds deeper and actually pulses sometimes.

I Tested the injectors in test mode and they all seem to be working fine

My fuel lines are in a loop, going from the tank to the pump and though the filter, here is a diagram.

[HP_Cuda]

Any way to get a fuel pressure gauge on it?

[GreenFish]

I Have a gauge on the regulator under the hood. I just put a trigger on the starter relay so I could watch it while cranking. There is almost 0 fuel pressure. It pulses up to about 5psi at most. I'm thinking my pump may be bad or have a clog in the line. but with brand new lines and pump why would that happen?

[JpRngr]

Can you pinch off the return and make sure it's not bleeding off?

[GreenFish]

Update:

So i went out this morning with a fresh charged battery and a new outlook on life....

I enabled test mode on the fuel pump and I hear it humming along sounding just fine. That was encouraging.

But I still have no pressure.  I run the adjustment in on the regulator and I can hear a very distinct difference in sound of the fuel pump. still no reading on the gauge but It is much lower frequency and sounds to be struggling a bit. So now I'm thinking the pump is fine, its the regulator.

any way to test a regulator?

[EbodyMod]

  Can you pinch off the line on the return side? that would tell you if the regulator is bad or your not pumping

[shawge]

Not auree if he has PTFE lines - pinching those would kink them right?  Would disconnecting the line to the regulator and terminating the line with the gauge show if the pump is putting out enough pressure?

Greenfish, you have the Aeromotive universal regulator? IIRC, those are easy to rebuild if necessary - just a spring and a ball bearing.  Maybe it is stuck open?

[soundcontrol]

   Following, since I got the same gear and will do this later.

[YellowThumper]

Can you pinch off the line on the return side? that would tell you if the regulator is bad or your not pumping

X2 on this.
In essence dead heading the fuel flow. Would be ok for shorter bursts.

[70chall440]

can you purge the line, maybe it has vapor lock.

[GreenFish]

turns out i'm an idiot. Fuel filter was backwards   

car still wont start but at lest i have fuel pressure now.

[EbodyMod]

If backwards filter is your worst problem, you are in good shape!! We have all been there.

[73440]

turns out i'm an idiot. Fuel filter was backwards   

car still wont start but at lest i have fuel pressure now.

I hooked up a trash pump today with inlet and outlet hoses backwards, ugh, and pouring down rain and old gas is keeping it from starting, so , yes, we know the feeling.

[YellowThumper]

Went thru a major wiring change when I added the Magnum accessories.
Finally got it to start after lots of retracing and head banging.


When I plugged in the distributor........

[70chall440]