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Old November 22nd, 2007, 12:43 AM   #1
dngrous_Jeep
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Default fuel tanks, 89 F250 gas, 2WD

Okay, I just got an 89 F-250 2WD, with the FI 351W and dual tanks. I haven't had a chance to tinker with it yet, I've only paid for it. Blew a brake line while pulling away to take it home, so it's still parked there. (he at least kicked back some of the purchase price, which is cool of him)



Anyway, he said the rear tank leaked, and that he thought the pump for the front tank was going bad. From what limited research I've been able to do, that makes no sense whatsoever, so can anyone fill me in on how this fuel system works? GF's dad told me that the return line emptied into one tank?

I've found another tank at a junkyard for $40, but if I can make this all work on one tank, that would be even more convenient. (not like I ever want to pay for both tanks being filled, anyway)
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Old November 24th, 2007, 03:30 PM   #2
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From what I remember there is a low pressure pump in each tank and one high pressure pump after the lines from both tanks join.
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Old November 25th, 2007, 11:45 AM   #3
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On my truck, which was a diesel, so i dunno, there was one pump, after the selector valve that switches tanks. If you are going to fix only one, make it the front, as the rears rust out constantly.
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Old November 25th, 2007, 02:55 PM   #4
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I was planning on converting to a single-tank setup, if possible. I have no need, nor desire, to have dual tanks.
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Old November 26th, 2007, 02:06 PM   #5
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Okay, a used gas tank at a junkyard will be $40, no clue on the condition. (I would look into it before I buy)

Or, I can take the existing tank to Renu in Traverse, and it would be reconditioned inside and out with a lifetime warranty for $132.50 after tax.

Thoughts?
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Old November 26th, 2007, 02:47 PM   #6
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I bought a 92 F-250 and it had just the front tank, the previous owner had cut the rear fuel lines and plugged them off. it worked great on one tank. I would check into a new tank from JC whitney befor you spent to much money, you might also run into the same problem with that tank from the junk yard to. Good luck.
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Old November 26th, 2007, 02:54 PM   #7
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I haven't checked JC Whitney, LMC Truck, or any other place like that yet. I know Autozone wasn't too bad on pricing for a new tank, I think it was $150?


Correction, Autozone is $119 + tax for a 19 gallon rear tank with 2yr warranty, and $145 + tax with a 3yr warranty.
$361 for a 38 gallon, 2yr warranty.
I think filling the tanks might cost as much as the truck itself did...

New tank strap is $33.... I'm thinking a piece of 1x1 box tubing with a bolt through it will do the job just as well.

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Old November 26th, 2007, 04:30 PM   #8
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It might be worth the cost of a new tank if you can get it for around 100-130$ ?

I like the tank strap idea.
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Old November 26th, 2007, 04:38 PM   #9
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I'm just debating the difference between having a reconditioned tank for $125 with a lifetime warranty, versus a brand-new tank for the same money, with only a 2yr warranty.
I suppose I could ask to see examples of their finished work.
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Old November 26th, 2007, 04:39 PM   #10
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Im confused
If the rear leaks, why buy a new rear tank? Why not just run on the front?

and arent the straps on the top of the tank with a skid plate bolting to the bottom, pushing up on the tank and straps? The top straps are USUALLY ok.

I think you should pull this crap out and look to see what you have before buying anything.
Do you not want to change the front out cause you think the pump is bad? Ford wouldnt put a high pressure pump in each tank. Look to see what you have first.
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Old November 26th, 2007, 04:41 PM   #11
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Quote:
Originally Posted by dngrous_Jeep View Post
I'm just debating the difference between having a reconditioned tank for $125 with a lifetime warranty, versus a brand-new tank for the same money, with only a 2yr warranty.
I suppose I could ask to see examples of their finished work.
Do you realize the pickup assembly doesnt come with the new tank. You have to reuse your old sending unit/pump assembly.
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Old November 26th, 2007, 09:19 PM   #12
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Quote:
Originally Posted by TurdBronco View Post
Im confused
If the rear leaks, why buy a new rear tank? Why not just run on the front?

and arent the straps on the top of the tank with a skid plate bolting to the bottom, pushing up on the tank and straps? The top straps are USUALLY ok.

I think you should pull this crap out and look to see what you have before buying anything.
Do you not want to change the front out cause you think the pump is bad? Ford wouldnt put a high pressure pump in each tank. Look to see what you have first.
I was told the front pump is going bad, so rather than replacing a $130 pump, I'd rather replace the tank. I know the sending unit and such would need to be reused.

There's no skid plate on either tank, probably because it's a 2WD truck.

And I'll be underneath the truck tomorrow, working on replacing the rear hard brake lines. Not sure if I want to replace the wheel cylinders while it's all apart, or not. (logic behind that idea, is that $14 a side is good preventative maintenance on a truck that's 18 years old. If the brake lines are old enough to burst from being rusted through, the rest of the braking components are most likely fairly worn out, too. Front brakes are fine.)
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Old November 26th, 2007, 10:11 PM   #13
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Quote:
Originally Posted by dngrous_Jeep View Post
There's no skid plate on either tank, probably because it's a 2WD truck.
Maybe so, I've never had a 2wd truck so i dunno. I'll still bet there is one high pressure pump after the lines join. Should be the same pump in both tanks though if you have that 2 low pressure/1 high pressure pump setup. So you could take the one out of the back and put it in the front. I wouldn't go thru all that mess though. If one pump went bad, wouldn't the other be not far behind?
Pulling tanks blows ass. I wouldn't want to have to do that twice cause i was cheap or lazy the first time.
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Old November 26th, 2007, 10:18 PM   #14
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There's different part numbers for the front and rear pumps, although I'm not sure how much that means, as far as them being non-interchangeable.
I really don't want to drop both tanks to pull both pumps to compare them. lol

However, the truck runs just fine on the rear pump/tank. It just leaks.

I ran the search again for the junkyards, and I see I can get a rear tank, front tank, front pump, and rear pump for $50 each. (I'll probably only buy the front pump and rear tank, if that's all that's bad.)

It does appear (according to parts store websites and the repair manuals I've referenced) that it does indeed use three fuel pumps altogether. (why Ford would design it that way, I'm not entirely sure. It would make more sense to me, to run only two high-pressure pumps with a remote valve, and power cutoff to the inactive tank.

And dropping the tank won't be as bad as it usually would be. It's already empty, due to leaking. :tonka:
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