Fuel Pump Replacement: Drop the Tank?
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Elder User
Joined: Aug 2005
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From: Mesa, Arizona
Fuel Pump Replacement: Drop the Tank?
Can anyone tell me if I have to drop the gas tank to remove the fuel pump on a 1995 Bronco 351?
What do I need to measure the fuel pressure at the rail? Is there a special pressure gauge or tool?
Thanks in advance.
What do I need to measure the fuel pressure at the rail? Is there a special pressure gauge or tool?
Thanks in advance.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
yes you need to drop the tank. isnt to bad but make sure its pretty empty before you do this. having a friend help is also a good idea along with a floor jack.
why are you needing to replace the fuel pump? whats going on
why are you needing to replace the fuel pump? whats going on
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Elder User
Joined: Aug 2005
Posts: 747
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From: Mesa, Arizona
Not exactly sure if the pump is bad, just sizing up the possibilities. She started cutting out and stalling. I need to get a code reader and pull the codes first. But the symtoms now are: Starts up but runs rough shortly and dies, if I spray some starting fluid in the air intake it runs good for a while. It's got 138K on it and never had any work to the fuel system. I will try to get the codes this afternoon and see if it sheds some light on the problem. Do you know what I need to check the fuel pressure at the rail?
Cargo Master
Joined: Aug 2004
Posts: 2,899
Likes: 2
From: Lynnwood, WA
There is actually a filter on the fuel pump (at the pickup), but to inspect/change that, you need to drop the tank. I'd try to eliminate all other possibilities before dropping the tank.
The fuel pump on my '95 died a bit before 140k, so I guess yours is probably do in the not too distant future, anyhow.
The fuel pump on my '95 died a bit before 140k, so I guess yours is probably do in the not too distant future, anyhow.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
are you sure you have gas in the tank. i have to ask because its happend before.
check fuel pressure at the valve near the fuel pressure regulator. when you turn the key to on can you hear the pump prime?
check fuel pressure at the valve near the fuel pressure regulator. when you turn the key to on can you hear the pump prime?
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Post Fiend
Joined: Mar 2002
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From: Bonita Springs FL
Originally Posted by aurgathor
If the fuel pump is bad, the car won't run. Many other things can be intermittent (i.e. a partially clogged fuel filter) but usually, the fuel pump either runs, or it doesn't.
It's VERY common for a fuel pump to die slowly. While it's in the process of dying, it will stumble and hesitate a lot. You can easily check the fuel pressure with a $30 fuel pressure gauge available wherever auto parts and tools are sold. I think I got mine at Sears.
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Senior User
Joined: Mar 2004
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From: END OF THE OREGON TRAIL
I had on incident with truck dieing and being towed home. At 120K + it seems to be maintenance on most Ford fuel injected trucks to replace the fuel pump. I went ahead and replaced the fuel pump after pressure check, pressure was OK but regulator was bad. Not holding pressure after shutting key off, and long cranking time for startup. No more hesitation and better throttle response with new pump,
If you have a receiver hitch bolted to the frame it makes dropping the skid plate and tank a lot harder.
If you have a receiver hitch bolted to the frame it makes dropping the skid plate and tank a lot harder.
Senior User
Joined: Jan 2003
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I would suggest making an access hole under the rear carpet area. My buddies 92 had a fuel pump failure at ~100,000 and we had to drop his tank to replace the fuel pump, and it took us like 6 hours total.... and it was a major pain. Shortly thereafter I cut an access hole to the fuel pump on 1990, and fabricated a cover for it. Well, my fuel pump finally failed last week at ~135,000 miles and I had it replaced within 1.25 hours.
Matter of fact, I'm going over to my friends house today to put an access plate in his.
Matter of fact, I'm going over to my friends house today to put an access plate in his.
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Elder User
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From: Mesa, Arizona
Great idea, making an access panel. Well I am out of town for 1 week and I didn't get the fuel pressure tested or the codes pulled. I guess it will have to wait. Do you have any dimensions for the cutting out the access panel, can you cut the panel while the gas tank is still in the truck?
Senior User
Joined: Jan 2003
Posts: 117
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No need to drop the tank...
I've done 2 Broncos now; my 90 and a friends 92. There are some hoses and wires under the area where the cutout goes, but all you need to to is place thin piece of metal(~ 1/4 inch thick) over them from underneath...that way when you go using your cutting wheel you won't slice into them and hit the plate steel instead.
I don't have dimensions; but if you're serious I can pull up my carpet and take some measurements. When we did my bud's on Saturday we modified my dimensions by approximately 1/2" since it seemed like it would be a better placement.....after we were done it did a appear a bit better than mine...not that it's significant or anything.
I don't have dimensions; but if you're serious I can pull up my carpet and take some measurements. When we did my bud's on Saturday we modified my dimensions by approximately 1/2" since it seemed like it would be a better placement.....after we were done it did a appear a bit better than mine...not that it's significant or anything.
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From: END OF THE OREGON TRAIL
Originally Posted by aurgathor
I wouldn't cut the floor for a once in 100k - 150k job, that's for sure.
