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still need to pour gas in carb
#1
well i am stuck. and after talking to a few other guys with a 71-73 musang with 351c seem to have same problem. i have replaced the tank, fuel lines, filter, pump, but i still have to pour gas into the carb to get it started. is it the carb? the Pump? any ideas?

Is wanting every Mustang you see wrong?

Current Mustangs
1965 Fastback
1967 S-Code Coupe
1972 Mach 1 HO
1967 GT fastback K-Code
1995 Gt Conv
2004 GT Conv Supercharged
2007 Shelby Gt500
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#2
Are you getting fuel from the pump to the carb? Pull the gas line and turn over the motor. I would work the system back from there. Are you useing all stock replacements or any changes? Just my thoughts.

BKDunha
72 Mach 1 H-Code (Concourse driven restoration)
67 S-Code Factory GT with 4-Spd

68 Mercury Cyclone (Pro-Street project)
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#3
I'm guessing that something is allowing your fuel line to empty.

Is it worse after sitting for a long period? Can you get it to start, say right after turning it off, or maby 5-10 minutes after turning it off?
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#4
not getting much fuel to the filter. i have a clear fuel filter to see the gas and not much is being pushed up. once the car starts it runs fine. after the car is turned off if i try to restart from 5min to about 2hrs it will start but anything after that i need to add fuel again.
i did pull the gas line and gas was being pushed up. (?) which is does not make since.

Is wanting every Mustang you see wrong?

Current Mustangs
1965 Fastback
1967 S-Code Coupe
1972 Mach 1 HO
1967 GT fastback K-Code
1995 Gt Conv
2004 GT Conv Supercharged
2007 Shelby Gt500
  Reply
#5
is your fuel filter in backwards?

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
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#6
sounds like the fuel pump is allowing the gas to bleed off down the line. even though its new may have a bad diaphram allowing the carb to lose its prime.

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]




                                                                                             
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#7
Now turtle's answer sounds like a winner to me!

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
  Reply
#8
should have a check valve right

Is wanting every Mustang you see wrong?

Current Mustangs
1965 Fastback
1967 S-Code Coupe
1972 Mach 1 HO
1967 GT fastback K-Code
1995 Gt Conv
2004 GT Conv Supercharged
2007 Shelby Gt500
  Reply
#9
I am with turtle as well. I had the same problem with a pump several years ago. Diaphram had a small hole in it causing the vaccuum to be lost and the fuel drained back out of the line.

BKDunha
72 Mach 1 H-Code (Concourse driven restoration)
67 S-Code Factory GT with 4-Spd

68 Mercury Cyclone (Pro-Street project)
  Reply
#10
It is not a check valve exactly, diaphragm pumps contain a pump chamber whose volume is increased or decreased by the flexing of a diaphragm, check valves are at both the inlet and outlet ports of the pump chamber to force the fuel to flow in one direction only. A check valve can fail, but the diaphragm itself is a flexible material and they do tend to develop cracks and leaks.

Marine use requires the mechanical pumps to have a drain hose that runs back to the carb as a leak in a boat can lead to a fire very quickly. If you have another fuel pump try it, if you don't go get one, they are relatively cheap and easy to install.

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
  Reply
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