Re: Tim's '55 Patrician

Posted by HH56 On 2012/1/6 19:34:52

Kind of depends on the type pump but most are pulser type and many are polarity sensitive. If yours is one, that could be an issue if your car battery had been reversed at some time. The pump may have been damaged.

Other pumps are rotary and very quiet. Usually that type will not allow fuel to pass unless running so needs to have extra plumbing when used in conjunction with the mechanical.

To run the pump, just need a good ground on the proper ground wire and the other wire to a 12v power source. Most take a lead off ign switch IGN terminal or a tie point which only gets power when ign switch is on in the engine run position. Fuse it, run it thru an on/off toggle switch located under dash edge and then to pump. (You wouldn't happen to have an extra switch under the dash that you can't figure out what it does do you?)

If wired with a switch you can turn ign key on, turn pump on for a few seconds to prime things and start the engine. Once engine is running turn the pump off and let the mechanical do the work.

To test it all you need is the ground connected and run a long piece of wire from the other pump lead either to battery or some other point to get power from. Once connection is made you should hear the pump. If it makes noise you can see if it fills the glass bowl. If not, disconnect the output side and connect it to a tube to see if it pumps gas into a container.