Manual Pump Bypass

AndysFords · #1 (**permalink**) 07-08-2008, 11:50 PM

I have never owned a Powerstroke before, just IDI engines and on all my trucks I always bypassed the manual fuel pump and installed an electric pump, can this be done on a Powerstroke? I have had to install pumps on Powerstrokes before and its not easy, I'm not going to do anything until it goes out but I would like to know before I go to swapping it. I would prefer to do away with it.

joe_13894 · #2 (**permalink**) 07-09-2008, 02:59 AM

There are two mechanical pumps.

The first is a diaphragm lift pump that pumps the fuel from the tank and puts it in the filter housing. There is a return orifice that returns fuel to the tank from the filter housing to purge air. Pressure is regulated by the diaphragm.

The second pump is a piston pump that draws from the filter and sends it to the heads. There is a pressure regulator that returns excess fuel to the filter housing.

I don't know anyone who's done it, but I don't see why it couldn't be re plumbed with one pump and setup to return from the fuel pressure regulator directly back to the tank.

westcoastslider · #3 (**permalink**) 07-09-2008, 03:29 AM

You could also bypass them both and get a pump strong enough to get it to the 75psi it wants.

Search for the electric pump mod.

Cuda_jim · #4 (**permalink**) 07-09-2008, 06:16 AM

There is only one mechanical pump that I know of. It lives in the engine valley. It is a 2 stage pump.....lift and pressure.

A regulated return fuel system is what you are looking for and can get pretty pricey.
Look here:
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tjbeggs · #5 (**permalink**) 07-09-2008, 08:58 AM

Jim is right. You can't add a E pump to the stock system cause the fuel filter housing won't take the 70 PSI. You can rework the whole fuel system with a pump, regulator and pre and post pump filters but its either all or nothing.

joe_13894 · #6 (**permalink**) 07-10-2008, 01:09 PM

Quote:

Originally Posted by Cuda_jim

There is only one mechanical pump that I know of. It lives in the engine valley. It is a 2 stage pump.....lift and pressure.

Sorry, I was less than specific. Yes, they are in the same housing.

Hussler · #7 (**permalink**) 07-10-2008, 03:09 PM

Quote:

Originally Posted by tjbeggs

Jim is right. You can't add a E pump to the stock system cause the fuel filter housing won't take the 70 PSI. You can rework the whole fuel system with a pump, regulator and pre and post pump filters but its either all or nothing.

I've been thinking about this for some time. Could you not use a low pressure electric lift pump to the filter then 70 PSI electric pump to the heads?

Something like this ... sell.com classifieds : Low Pressure Electric Fuel Pump gas,diesel, marine for sale (23JR6T)

tjbeggs · #8 (**permalink**) 07-10-2008, 03:29 PM

Quote:

Originally Posted by Hussler

I've been thinking about this for some time. Could you not use a low pressure electric lift pump to the filter then 70 PSI electric pump to the heads?

Something like this ... sell.com classifieds : Low Pressure Electric Fuel Pump gas,diesel, marine for sale (23JR6T)

I am sure you could but if your going thru the work and spending the money you might as well replace the fuel bowl and regulator with better products. Or just install a SD pump and fuel filter bowl but that isn't exactly an upgrade either due to the dead headed fuel system.