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Car dies after driving about 1/2 hour
#31
Fuel pump?
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#32
(08-29-2018, 05:12 PM)Danno Wrote: Could the fuel pump be taking a dump after running for a while?
I'll retry the gas can trick, then look at the sending unit pickup and the tank condition next...….. Shootself Shootself Shootself

You ruled ou the fuel pump earlier when the line went into a separate gas can.  This time, your hose probably came out of the fuel and it was trying to suck air, which doesn't work, leaving fuel in the line.  Try it again from the rear pickup hard line, and I bet it will run just fine. 

That's my story and I'm sticking with it.  Your problem is in the tank itself.

Let me check your shorts!
http://midlifeharness.com

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#33
(08-29-2018, 07:54 PM)midlife Wrote:
(08-29-2018, 05:12 PM)Danno Wrote: Could the fuel pump be taking a dump after running for a while?
I'll retry the gas can trick, then look at the sending unit pickup and the tank condition next...….. Shootself Shootself Shootself

You ruled ou the fuel pump earlier when the line went into a separate gas can.  This time, your hose probably came out of the fuel and it was trying to suck air, which doesn't work, leaving fuel in the line.  Try it again from the rear pickup hard line, and I bet it will run just fine. 

That's my story and I'm sticking with it.  Your problem is in the tank itself.

Ok, retraced all my troubleshooting:
Hooked an external full gas can and line to inlet port on the fuel pump, and it ran for 45 minutes+,  until I shut it off. Went back and connected the line with a rubber hose and a full gas can to the rear  end of the hard line  connection and it died within 20 minutes.
Maybe time for a hand over hand check of the hardline to see if it is damaged, or possible an overheating coil, a *weak fuel pump*? The coil does get very hot.
It tries to start, but sputters and dies after stalling when I use starter fluid, so  it's not  getting fuel. There is no real connection between the coil and the pump. I'm open to suggestions.
While troubleshooting today with a friend we took the top off the carb after it died, and there was no gas in the bowl. We cleaned it out and put it all back together, and after that, it ran from the pump  hooked to a can and it ran until I shut it off, then hooked it up in the back with the can and it died...…….The tank and sending unit are totally out of the system at this time.

I'm about ready to just throw a fuel pump at it and see if that helps...………... Shootself Shootself Shootself
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#34
You tested the fuel pump for 45+ minutes, did you not? The problem lies in the line from the inlet side of the fuel pump to the back of the hard fuel line. You probably have a crimp in it somewhere, or perhaps a pinhole leak that you're not detecting. Here's another test:
Get a long rubber hose of fuel line and go from the tank outlet to the inlet side of the fuel pump. I'll bet it will work just fine.

Let me check your shorts!
http://midlifeharness.com

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[Image: oldfart.png]
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#35
(09-04-2018, 06:19 PM)midlife Wrote: You tested the fuel pump for 45+ minutes, did you not?  The problem lies in the line from the inlet side of the fuel pump to the back of the hard fuel line.  You probably have a crimp in it somewhere, or perhaps a pinhole leak that you're not detecting.  Here's another test:
Get a long rubber hose of fuel line and go from the tank outlet to the inlet side of the fuel pump.  I'll bet it will work just fine.

+1 on this test but this is only for testing.

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


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#36
(09-04-2018, 06:29 PM)73pony Wrote:
(09-04-2018, 06:19 PM)midlife Wrote: You tested the fuel pump for 45+ minutes, did you not?  The problem lies in the line from the inlet side of the fuel pump to the back of the hard fuel line.  You probably have a crimp in it somewhere, or perhaps a pinhole leak that you're not detecting.  Here's another test:
Get a long rubber hose of fuel line and go from the tank outlet to the inlet side of the fuel pump.  I'll bet it will work just fine.

+1 on this test but this is only for testing.

Started up this morning with the hose/can setup at the rear end of the steel  line. The car started and ran normally for about 15 minutes, then died. I did a visual and "hands on" check of the hard line from front to back, and I saw no obvious problems, dings, dents, or leaks. I have already blown air through the line, so its clear.
Could the fuel pump be too weak or unable to continue  pulling the fuel all the way from the back for some reason? Guess I'm going to do the long rubber fuel hose trick and see what that does. I can always resell the hose after I'm done with it...…...LOL!
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#37
you may have corrosion inside the hard line that is restricting the fuel enough to cause this but will still let you blow air through and look fine from the outside.

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
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#38
To determine if it's the fuel pump, or not, as soon as it does I would connect a vacuum gauge to the fuel pump inlet, see if it is attempting to draw in fuel. Then, after disconnecting the vacuum gauge, connect a pressure gauge to the outlet, to see if it is trying to pump fuel out. You'll want to get at least 4 or 5 psi pressure out.

You can also connect a vacuum pump, with a container before the pump, to the fuel line from the tank, to see if you can pull any fuel out of the tank.

A restriction in the fuel line, especially if you also have a pin hole that let's air in, will hamper the fuel pump operation.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#39
Did you try to blow air thru the discharge line from the sending unit ? I recall in the past that the sock installed in the tank would get weak and suck closed. Sometimes you can blow it right off the sending unit or drain the tank, remove sending unit and remove sock.
Thanks, Jay
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#40
Don't forget the small hose that connects the main fuel line to the piece that runs parallel to the inner fender, located near the brake combination valve. Maybe it is collapsing in on itself or the inner lining is breaking down, blocking fuel.

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