Knowinghades63 Posted September 6, 2020 Report Share Posted September 6, 2020 I’m having trouble installing my fuel pump correctly I imagine. I get it to bolt onto the block but when I crank the motor I get no vacuum or fuel pressure. Is it possible to miss the cam lobe? I have taken it off and on several times. Quote Link to comment Share on other sites More sharing options...
desoto1939 Posted September 6, 2020 Report Share Posted September 6, 2020 The first question is what is the manufacturer of the fuel pump also what is the fuelpump number that you installed? Did you get any number off of the old fuel pump such as 588 etc. Is this a NOS fp and by this I mean was it listed as a new old stock and might have been sitting for years or a rebuilt pump that is not enthanol refurbish to use the ethanol fuels. The old ones do not support this newer fuel and the rubber diaphrams get destroyed. Did you install it inthe correct position. You might also have a clogged fuel line. Blow compressed air back down the fueling at the front of the engine where the rubber fuel line connects to the FP. Have someone take the gas cap off and listen to hear if you hear any air coming out of the gas tank. If no air sound then might be a clogged fuel line. If you get air sounds checkthe rubber hose that connects to the fp it could be so old that it is colapsing aDN NEED TO REPLACE THIS RUBBER HOSE. Did the car run prior to this issue or has it been sitting for a long time. We need more information, but the above might get you started again. Rich HArtung desoto1939@aol.com 1 Quote Link to comment Share on other sites More sharing options...
soth122003 Posted September 6, 2020 Report Share Posted September 6, 2020 Hey bud, It is almost impossible to install the fuel pump incorrectly. It is either right side up (correct) or upside down (incorrect). Glass bowl or wide base points down. Couple of questions, 1. Are you sure you have the right fuel pump? Does it look like your old one? Is the pump arm the same as the old one? 2. You say you have no pressure or vacuum from the pump. Where are checking for this? At the pump or from the lines connected to the pump? There are usually 3 things that describe your problem. Wrong pump. Cracked or obstructed fuel line in the system. Or you are out of gas. Make sure you have the right pump. The same pump can have different pump arm configurations depending on the model of the car. Also you could have a bad brand new pump. Seen it before though not often. Check the pump by hand by working the lever arm. You should hear it sucking and weezing. ( unless you're an old geezer like me then it might be you) Check the rubber hose that connects the pump the the fuel line from the tank. could be collapsed or rotted either blocking fuel or sucking air. Check the line to the tank by blowing air thru it to clear any obstructions and listen for bubbling in the tank. Also do a visual inspection of the line to check for damage and rusted areas. Replace if any bad spots are found. If it is bad in one spot then there are others you can't see. Check the fuel level in the tank. You might be out. Check those and if it still persists check the fuel cap and make sure it is a vented cap. Joe Lee Quote Link to comment Share on other sites More sharing options...
soth122003 Posted September 6, 2020 Report Share Posted September 6, 2020 Hey Rich you beat be me by about 5 minutes. I was eating brunch. Joe Lee Quote Link to comment Share on other sites More sharing options...
desoto1939 Posted September 7, 2020 Report Share Posted September 7, 2020 6 hours ago, soth122003 said: Hey Rich you beat be me by about 5 minutes. I was eating brunch. Joe Lee Soth122003: Great minds thinl alike. Glad to see that someone else was thinking the same things as me. Waiting to hear back from the original poster with his updates. Sounds as if he might have the wrong pump or there isa blocked line being my first to quesses. Rich Hartung Quote Link to comment Share on other sites More sharing options...
nc plumber Posted September 7, 2020 Report Share Posted September 7, 2020 I'm thinking a clogged line. The old pump acted the same way as the new one. Quote Link to comment Share on other sites More sharing options...
greg g Posted September 8, 2020 Report Share Posted September 8, 2020 Discon the hose in the suction side of the pump set your compressor out let pressure to bout 10 psi. Blow air back through the tank with the cap off. You or an assistant should be able to hear a strong flow of bubbles coming from the fill. There is a scintered brass filter on the fuel pick up in the tank the air will clear it temporarily. The effect could last a few minutes or a few months depending how much rust is in your tank. When you crank the engine, leave the fuel cap off to make sure the tank is vented to the air. Then check the line from pump to tank if there are any places where it might besucking air, the pump will not pull sufficient volumn to sustain drive at cruising speed. Your gas cap should be a vented one. Quote Link to comment Share on other sites More sharing options...
joecoozie Posted September 9, 2020 Report Share Posted September 9, 2020 To eliminate the possibility, or to verify the possibility, of an obstruction in the fuel line from the tank simply run a rubber fuel line from the inlet side of the fuel pump to a remote gas can. If the pump moves gas without any issues then you probably have an obstruction somewhere in the fuel line. If the pump does not move gas then there is something wrong with the fuel pump - bad or not installed correctly... Quote Link to comment Share on other sites More sharing options...
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