Fuel pump?
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4th Gear
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Fuel pump?
Hey guys, I am running an '83 F350, 460, with carburetor and mechanical fuel pump. Recently the fuel pump went out and I replaced it with a new one from O'Reilly's. Well the pump cannot keep up with the fuel consumption on the highway - not even without a load. So I am assuming I got a fuel pump designed for a 429 or something... Now I am planning to order one from Summit. Can anyone tell me the correct PSI and GPH for a stock 460? I want to be sure I get the right one this time.Thanks.
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From: Virginia
If the pump bolted on, it's the right pump. You have something else wrong or the pump is faulty. Any pump that fits will have more than enough capacity for your engine. What about the fuel filter?
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FTE Legend
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From: Angier, NC
How old are the rubber hoses on the fuel system?
They go bad on the inside but look good on the outside.
There are at least 2, tank to hard line and hard line to pump.
Replace them before the pump again.
Dave ----
They go bad on the inside but look good on the outside.
There are at least 2, tank to hard line and hard line to pump.
Replace them before the pump again.
Dave ----
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4th Gear
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Anyone know the flow rate for the 460?
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Pressure should be 5 psi.
There is a specified procedure to follow. Refer to a service manual for proper testing procedure.
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From: Angier, NC
Some if not all 460s have it and wonder if someone made a change and it is bypassing to much fuel?
Other wise I would say bad new pump.
Dave ----
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I'm leaning towards a bad new pump too. It was running fine before the fuel pump went out. He's checked filters good and clean. And we have seen some complaints on mechanical fuel pumps being bad out of the box. The cost and time of getting set up to do a fuel pump test for pressure and flow might be more than another fuel pump. If the last one was El cheapo from china maybe try a better fuel pump? What brand fuel pump are people finding to be robust? Maybe somebody could advise the OP?
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On Rockauto.com they do recommend a new filter with pump replacement. Even though you recently changed it after a fuel pump failure it could have been partially plugged and it might not be apparent to the eye. They're cheap so replace with new first.
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4th Gear
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I'm leaning towards a bad new pump too. It was running fine before the fuel pump went out. He's checked filters good and clean. And we have seen some complaints on mechanical fuel pumps being bad out of the box. The cost and time of getting set up to do a fuel pump test for pressure and flow might be more than another fuel pump. If the last one was El cheapo from china maybe try a better fuel pump? What brand fuel pump are people finding to be robust? Maybe somebody could advise the OP?
Also, the truck has already had the hot fuel return line removed, and we are straight to the carb from the pump with no bypass. I removed this same system in my other truck already due to bypass valve failure. I live in Washington so heat is rarely an issue. I have never had issues with either truck having the return line and valve removed. Only have had issues with vales failing.
I'll let you all know how it goes.
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From: Virginia
Also, the truck has already had the hot fuel return line removed, and we are straight to the carb from the pump with no bypass. I removed this same system in my other truck already due to bypass valve failure. I live in Washington so heat is rarely an issue. I have never had issues with either truck having the return line and valve removed. Only have had issues with vales failing.
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4th Gear
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On both my trucks the original pumps are still in. On my '84 (that runs fine) I installed an Edelbrock electrical pump... On my '83 (the o e I am having the issues with) I installed a mechanical pump. But the truck ran fine for years before the pump failed. So I'm really doubtful that there is blockage caused by the original pumps.
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From: Virginia
Even though it worked for you before, the idea of it having to pull though a non-running pump doesn't seem right. I would pull the sending units out and put a piece of hard line in place of the old pump. Then re-install the sending units.