Question about 1984 Ford F 150

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My fuel pump is not pumping gas to the carburetor

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You probably need a new fuel pump. They have a diaphram that can go bad. if it is new and is not electric make sure that it is placed in its hole correctly it is operated like an old pump style well pump. There is an offset cup style washer that rotates to activate the pump inside of that hole. it is possible to miss this washer if you are not careful. I have done it myself. You should be able to tell that you hit the washer if the fuel pump is a little resistant when tightening the screw. Good luck

Posted on Feb 01, 2011


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Carsurges and has no power will no turn more than 3500 rpm and will die out if stay on gas

This may possibly be due to a fuel issue, although there could alternatively be an electrical issue. Check to make sure you have good spark and good distributor cables and distributor cap (no cracks or cross wire sparking). We had an issue with a car that would die when going at highway speeds. It turned out to be due to a fuel issue from a broken spring in the fuel pump. I don't know if this is related to your issue but you may check your fuel pump by disconnecting the fuel line leading to the carburetor and placing it into a soda bottle. Have someone very briefly turn over the engine and you should see good squirts of gas into the bottle. If the gas only dribbles out there may be a problem with the fuel pump or a plugged fuel line before the fuel pump. It is hard to tell which, but I would guess the fuel pump at this point and replace it. If the gas still dribbles out, unfortunately it was a plugged line somewhere between the fuel tank and the fuel pump (It may be very difficult to find where). Be extremely careful to not spill any gas when doing this, keep free of moving parts, and keep the engine on only for a very short time (a few seconds) to minimize any fire risk. Remember safety first! If the gas is squirting out as it should, the problem may be in your carburetor or a plug in the fuel line after the fuel pump, or a likely candidate - a plugged fuel filter. You may try replacing the fuel filter just on general principles. If the carburetor is the problem, perhaps a few squirts of carburetor cleaner into the air intake of the carburetor might help. In fact, you may try using carburetor cleaner before you try anything else (even before trying the test on your fuel pump) as this is the easiest thing to do first, then do the fuel pump test, next change out your fuel filter, and finally, if this does not help, then you may have a more difficult job of disassembling and rebuilding the carburetor - a job I wouldn't recommend unless you have some experience - or there may be a fuel line plug somewhere else in this part of the system.

Sep 18, 2017 | Cars & Trucks

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Not getting gas to carb

It could be. Since you have a carburetor, you must have a mechanical fuel pump on the engine? Only some imports with carburetors had an electrical pump.

If your filter is in the line just before the carburetor, take the line off at the filter, then crank the engine over to see if the pump is working. Mechanical fuel pumps will pump gas when the engine is cranking or running. Use a jar or can to catch the gas. If pump is working, fuel will come out in small spurts. It's not under high pressure- carbs don't need high pressure. If no gas comes out of the line, you probably need a new fuel pump. If the pump is working, it could be the filter, but could also be the needle valve and seat at the carb's fuel inlet. Sometimes they get stuck closed and won't let gas into the carburetor.

Aug 01, 2015 | Cars & Trucks

2 Answers

Car want start but when u put gas in carberato it start but cut off

Fuel pump could be bad. Newer car? Could be security. Year make and model helps.

May 10, 2015 | Cars & Trucks

1 Answer

I just installed a holley blue electric fuel pump and regulator. When I get on the highway I cant go more than a couple miles before I lose fuel pressure and have to pull off the road to refill the bowls...

Several things for you to check. I'd start with the fuel cap. Try to run the truck without a fuel cap on it and see if the problem occurs, perhaps the fuel cap is creating a vacuum and keeping the gas from flowing. Then, try taking a long hose and run it from the electric fuel pump back to the gas tank, and run the pump and see if the pump will pump continuously for 10 - 30 minutes. If this does not work, perhaps the fuel supply is blocked or the fuel line hose is collapsing between the pump and the gas in the tank.
Another thing could be is the fuel filter on the carburetor itself. Many carburetors have a screw-in fuel filter right where the gas line attaches to the carburetor that has a metal or paper filter inside. If this got dirty with all your work, perhaps that is it. Be blessed.

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1 Answer

I replaced gas tank, fuel line, fuel pump, carburetor, and still no gas to Carburetor.

A mechanical fuel pump works off a lobe on the cam, usually. I have seen these cams wear down to the point that the fuel pump does not operate correctly. A quick test is to; remove the fuel lines from the pump, plug the oulet side of the pump with your finger, install a vacumm gauge on the inlet side and crank the engine. The gauge should show good vacumm and you should feel pressure against your finger. If none of these exist then you should replace the camshaft.

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U can see that the fuel pump is working but the car will not start. We have changed the fuel filter an there is gas getting to the carborator but very little. If u put gas directly into the carborator it...

There is a fuel pump relay but no pressure relay. If the pump is working then that eliminates the relay as the cause. I would disconect the fuel line to the carburetor and check the fuel pressure there. I believe it is supposed to be 12-14lbs. If it is less, the pump could be going bad.

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did you try changing the fuel filter? it could be completely clogged

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