 Tracing Down Fuel Pressure, Hose Imploding... |
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| 7TPorsh |
 Sep 4 2012, 02:03 PM
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7T Porsh  Group: Members Posts: 2,691 Joined: 27-March 06 From: Glendale Ca Member No.: 5,782 Region Association: Southern California 
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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 |
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| SLITS |
Sep 4 2012, 08:50 PM
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
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? |
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Posts in this topic
7TPorsh Tracing Down Fuel Pressure Sep 4 2012, 02:03 PM
ellisor3
Car has running ok then slowly developed fuel sho... Sep 4 2012, 02:06 PM SLITS If you are connected to the outlet pipe of the tan... Sep 4 2012, 02:06 PM underthetire And try it with the gas cap off. Sep 4 2012, 02:40 PM Jeffs9146 Loosen the nut around the feed pipe and turn it so... Sep 4 2012, 03:26 PM 7TPorsh I put a new sock in when i did the fuel pump; old ... Sep 4 2012, 04:09 PM
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