Saturday, July 4th, 2009

Do older cars, In particular a 84 Ford LTD need to be hooked up to the alternator for the fuel to pump?

i have a 84 Ford LTD. My car cranks but the fuel is not praying in the carborater but fuel is getting to the carborator. Currently the alternator is not on my car. Does my car or all older model cars need to be hooked up to the alternator so the fuel pump to have enough power to pump the fuel with enough force so it can spray in the carborater?

it maybe be possible that it has to be hooked up to make all the power connections it needs to fire but that depends if it has an electric fuel pump or not

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4 Responses to “Do older cars, In particular a 84 Ford LTD need to be hooked up to the alternator for the fuel to pump?”

gremlingts Says:
July 4th, 2009 at 9:57 am

No, the battery is sufficient to allow the fuel pump to work and any * note this * " carburetor " <correct spelling > electronics to work as well.

So, you could have a stuck float, the fuel filter may be clogged up, if it’s an electronic carb, the little rotary pump inside may be jammed or not working. If you dribble gas down into the top of the carb, does the car try to fire then? If so, check the fuel supply by unhooking the line from the carb, and running a rubber hose from the end of the line to a small jar or gas container, and see if the fuel pump IS pumping any gas. If so, then it may be the carb’s internal float or filter. Good luck! I hate Ford carbs….and AMC, and Chevy, and…

- The Gremlin Guy -
References :
experience

mommmy2be Says:
July 4th, 2009 at 10:28 am

it maybe be possible that it has to be hooked up to make all the power connections it needs to fire but that depends if it has an electric fuel pump or not
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Bob H Says:
July 4th, 2009 at 11:01 am

No, it’ll pump up anyway; it’s mechanical. What it probably wont do is give a spark unless the whole circuit is connected and the battery is FULLY charged. By now, the plugs are prolly fouled from unburnt gas. I would look at a couple of plugs, wire up the alternator and get a fully charged battery AND get a jump.
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some guy Says:
July 4th, 2009 at 11:16 am

The answer is no. That probably still has a mechanical fuel pump so as long as the engine is turning over you should get fuel to the carb. And as you say you have fuel to the carb but it is not spraying I would suspect you may have a bad accelerator pump inside the carb. or a bad needle and seat assembly that will not allow fuel into the carb. If the car has been sitting for a while the accelerator pump could have dried out and won’t pump anymore. That’s where I would look first.
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