Tracing Down Fuel Pressure, Hose Imploding... Options

[7TPorsh]

Car has running ok then slowly developed fuel shortage issue. Idles but doesn't drive.

I bought an inline fuel gauge and hooked it up just before the tee to the carbs. 1.5 psi barely. If I let it build it will get to 3 and i start the car.

I relocated the pump up front about 6 months ago...new Carter next to the spare tire. All new hoses; the high rate injection hoses. Along with a new stainless tube down the tunnel. Again worked great for a little while.

Anyways, I pulled up the tank to inspect and see that the first couple of inches of hose coming out of the tank looks pinched or squeezed about halfway. WTF.

So I cut that piece off and reconnected it like new. There is slack in there from the previous install.

Worked better and i could drive; then it started sputtering again. Pulled up the tank to see the same thing.

I am pretty sure the hose isn't binding. It's the larger size hoe that gets stepped down into 5/16? and into the fuel filter...which may also be the culprit.

Is it possible (easily) to bend the output pipe on the tank to make it farther from the wall?

Has anyone seen hose act like this? I paid like $8/foot. It seems pretty thick and has a thread going through the rubber.

thx Gary

[ellisor3]

Car has running ok then slowly developed fuel shortage issue. Idles but doesn't drive.

I bought an inline fuel gauge and hooked it up just before the tee to the carbs. 1.5 psi barely. If I let it build it will get to 3 and i start the car.

I relocated the pump up front about 6 months ago...new Carter next to the spare tire. All new hoses; the high rate injection hoses. Along with a new stainless tube down the tunnel. Again worked great for a little while.

Anyways, I pulled up the tank to inspect and see that the first couple of inches of hose coming out of the tank looks pinched or squeezed about halfway. WTF.

So I cut that piece off and reconnected it like new. There is slack in there from the previous install.

Worked better and i could drive; then it started sputtering again. Pulled up the tank to see the same thing.

I am pretty sure the hose isn't binding. It's the larger size hoe that gets stepped down into 5/16? and into the fuel filter...which may also be the culprit.

Is it possible (easily) to bend the output pipe on the tank to make it farther from the wall?

Has anyone seen hose act like this? I paid like $8/foot. It seems pretty thick and has a thread going through the rubber.

thx Gary

Did you check to see if the sock is clogged, or trash in the tank?

[SLITS]

If you are connected to the outlet pipe of the tank, it could be the sock inside is plugged and the suction pressure of the pump is collapsing your hose.

or

Even at $8 per foot, it may not have the necessary rigidity for suction.

If you want to move the tank fitting, the nut can be loosened and the pipe rotated.

[underthetire]

And try it with the gas cap off.

[Jeffs9146]

Loosen the nut around the feed pipe and turn it so it faces in a more desirable direction!

[7TPorsh]

I put a new sock in when i did the fuel pump; old one was clean too. Probably bad batch of hose.

So odd.

Does anyone make a step down hose adapter that is a fuel filter too?

Know two birds with one shot.

[SLITS]

As far as your hose sizes, I used 3/8" supply hose from the tank to the pump. I got a metal filter from the local FLAPS that had 3/8" in and out and placed the filter prior to the pump. I ran 3/8" SS supply line. This was on a CIS system that supplies 75 psig to the fuel distributor and a lot more volume than a carb pump.

5/16" SS was what I used for the return line.

Something is not allowing your fuel to flow freely. If you have an air source, you can try blowing back thru the line in case something in the tank clogged the sock.

The only time I've seen a hose collapse like you are talking about was when I was pumping a very viscous chemical. When you take the fuel line that you bought and pinch it with your fingers, is it really flexible?