question about Holley fuel pump

[222lifer]

I recently purchased a 340 Duster and am just learning about the fuel delivery system that the former owner was running in it. The Holley 838 fuel pump is seeping fuel around the screws that hold the two halves together. It has an electric fuel pump along with a pressure regulator. I only run the electric pump at start up then shut if off and let the mechanical pump do it's job after that. When I hit the electric pump switch to prime the system fuel seeps out from the screws on top of the mechanical pump. The screws holding the two halves of the pump together are tight. It does not seep after I turn the electric pump off. I am also not too sure about keeping this pump on the car. The bottom of the pump where the fuel line fittings are contact the lower radiator hose. Is there a better choice of pumps for the 340? Any ideas on this?

 

[222lifer]

Been a few weeks and no replies. Does anyone know where or if a rebuild kit is available? I haven't been able to find it locally.

 

[Abodybomber]

Pull the electrical pump,or the mechanical pump. Sounds like the diaphragm in the mech pump has shrank,or died from today's ethanol laced pump gas. I would eliminate the electrical pump,replace the Holley,with a Carter hi flow street pump. Simplify the situation.

 

[autoxcuda]

Pull the electrical pump,or the mechanical pump. Sounds like the diaphragm in the mech pump has shrank,or died from today's ethanol laced pump gas. I would eliminate the electrical pump,replace the Holley,with a Carter hi flow street pump. Simplify the situation.

I agree.

And many times electric pumps are added to mask over some other issue with the car at one time or currently. Sometimes added when not even needed at all.

Take a look around at all the fuel lines between the tank and carb. Check to see if any are near a heat source, pinched, repaired, not factory line from electric pump to passenger inner fender, etc, etc... I know you don't currently have an issue with any of that. But since it's a new car to you and the two fuel pumps are a major flag, check things out with a fine tooth comb.

 

[222lifer]

Pull the electrical pump,or the mechanical pump. Sounds like the diaphragm in the mech pump has shrank,or died from today's ethanol laced pump gas. I would eliminate the electrical pump,replace the Holley,with a Carter hi flow street pump. Simplify the situation.

Thanks for the reply. Like you said, I am thinking along the lines that the diaphragm is the problem. The pump that is on the car does require a pressure regulator. Checked the pressure at the carb and it is 6 PSI.

 

[222lifer]

I agree.

And many times electric pumps are added to mask over some other issue with the car at one time or currently. Sometimes added when not even needed at all.

Take a look around at all the fuel lines between the tank and carb. Check to see if any are near a heat source, pinched, repaired, not factory line from electric pump to passenger inner fender, etc, etc... I know you don't currently have an issue with any of that. But since it's a new car to you and the two fuel pumps are a major flag, check things out with a fine tooth comb.

Thanks for the reply. I do need to learn about this car. I found a few things not fuel delivery related that made me scratch my head. One of those "why the heck did they do that" moments.