Fuel Pump Replacement.
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Fuel Pump Replacement help please
Hi All,
I've recently been having a problem with my 1999 expedition. Sometimes it would start, sometimes it wouldn't. I replaced the Fuel Pump and PCM relays, and the problem persisted. I put the back seats down, to better hear the fuel pump. Sometimes I could hear it, sometimes I couldn't. Needless to say, the EXPY wouldn't start if I didn't hear the pump. I've confirmed that voltage is reaching the pump, and that it has a good ground, so..the next step is replacing it. Diagnosing it was the easy part.
Anyway, when I put in a siphon tube, it seems to hit a stop, or sharp bend before I can actually get it into the tank...which is more than a slight problem, since I've still got 2/3 to 3/4 a tank in there.
Bottom line is: I'm fishing for any tips or tricks anybody may know that may make dropping the tank and replacing a little easier.
Thank you in advance.
I've recently been having a problem with my 1999 expedition. Sometimes it would start, sometimes it wouldn't. I replaced the Fuel Pump and PCM relays, and the problem persisted. I put the back seats down, to better hear the fuel pump. Sometimes I could hear it, sometimes I couldn't. Needless to say, the EXPY wouldn't start if I didn't hear the pump. I've confirmed that voltage is reaching the pump, and that it has a good ground, so..the next step is replacing it. Diagnosing it was the easy part.
Anyway, when I put in a siphon tube, it seems to hit a stop, or sharp bend before I can actually get it into the tank...which is more than a slight problem, since I've still got 2/3 to 3/4 a tank in there.
Bottom line is: I'm fishing for any tips or tricks anybody may know that may make dropping the tank and replacing a little easier.
Thank you in advance.
Last edited by blwilli; Oct 26, 2007 at 04:26 PM. Reason: update to better title
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From: Cornelius, Oregon
newer cars typically have a screen at the bottom of the filler neck so you can't insert a hose and siphon gas. You have to break that screen to get a hose in there and siphon. I'd try disconnecting the fuel line from the tank and siphoning off of that. Or use the electric fuel pump route that buzzard mentioned.
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Well, once I got the truck up on stands, the solution became apparent. Remove the section of hose from the filler tube and the dank, the screen is on the filler tube, so siphon directly from the tank. It actually took me longer to get the gas out than drop the tank. Then new pump is in, and the EXPY is happy again.
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From: All over Texas
Originally Posted by blwilli
ok buzzard, when you say install an inline fuel pump, do you mean to get the gas out, or are you suggesting that as a permanent fix?
I was thinking about a permanent install as I use one on my 1968 F250. The only thing I don't know about is whether or not the new pump would be able to pump gas through the old, inoperable pump that's still in the tank....I dunno???
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Totally different type of fuel pump there. The pump in your 1968 is a mechanical pump, it uses a diaphram and works much like a siphon. The fuel pump in my Expedition, and pretty much all modern vehicles is an electric fuel pump, which puts out the much higher fuel pressure needed for fuel injected engines. Those electric fuel pumps also use the gas as a coolant, which is why running it dry could destroy it. Most in line electric fuel pumps won't put out the 60lbs of pressure (max) that the truck needs. However, way back when, I did go that route for a Bronco II, that's an easy fix for a carburated vehicle.
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From: All over Texas
Originally Posted by blwilli
Totally different type of fuel pump there. The pump in your 1968 is a mechanical pump.....
When I rebuilt the truck, for some inexplicable reason I couldn't get gas to the carb via a stock mechanical pump so I installed the electric pump and haven't missed a beat since.
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From: Cornelius, Oregon
Originally Posted by blwilli
Most in line electric fuel pumps won't put out the 60lbs of pressure (max) that the truck needs.