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Generations 8-9 1987-1996 F150 + 1987-1997 F250, F350

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  #1  
Old 07-31-2017, 03:48 PM
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Dropping The Midship Fuel Tank on my '89 F250 Gasser

The sending unit quit working last year on the midship tank. I bought the combination fuel pump/sending unit with filter since I only want to do this job once. Some people suggest removing the tank shroud before removing the tank, but I didn't find that was necessary. Since the threads on the tank strap bolts are not rusted, it was not difficult to loosen the threads.

I was hoping the upper bolt was a carriage-type bolt, but it isn't. You have to get a 13mm wrench on the bolt on top, and the nut is a 15mm. I am waiting for help to drop the tank so I can get at the sending unit.

I will post the results later after I get the tank dropped. Putting the tank back in, shouldn't be that hard.
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'78 F-150 Lariat

Quote:
Originally Posted by john112deere
I think the lens of time is required to differentiate between the real milestones, and the detours along the way.
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Strippers, ammo and SKS, wow, that is almost sig worthy!!
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  #2  
Old 08-01-2017, 12:12 AM
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Got the tank out without any real issues. I was able to support the tank on a plastic bucket while I disconnected the electrical and fuel lines/vent lines. I didn't realize, however, that the plastic vent line runs down inside the rubber fuel fill hose. I had to disconnect the fill hose at the tank in order to remove the tank.

I pulled the old sending unit/pump and tested both. The pump ran and the sending unit checked okay for ohms, but the brass float was full of gas. Problem solved. Now I have fuel level indication in the front tank. The inside of the metal midship tank was spotless, so somebody previous to me had kept the tank full, which limited the condensation/rust. The lock ring was also easy to get off, and I reused the old lock ring.

The next step is to replace the fuel pump/sending unit in the rear(aft axle) tank. I will test drive the truck tomorrow to see if it solves the stumbling issue or the tank switching issue.
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'78 F-150 Lariat

Quote:
Originally Posted by john112deere
I think the lens of time is required to differentiate between the real milestones, and the detours along the way.
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Originally Posted by mrxlh View Post
Strippers, ammo and SKS, wow, that is almost sig worthy!!
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  #3  
Old 08-01-2017, 08:05 AM
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On my 88 250, I can take the exhaust apart, so I drop it, then after taking the shroud off, I am able to change the pump without dropping the tank... Rear tank is no way to do without dropping, but I have found if I move the exhaust, which on my truck is easy, I can just sit under the truck and take the pump out.
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  #4  
Old 08-01-2017, 09:40 AM
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MIA for a couple of days. sorry


You need to pull your throttle body off, and check the gasket.

I have found over time this gasket to fail, and cause the backfire you are talking about.
Usually on the 5.8, and 7.5's
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Old 08-01-2017, 09:53 AM
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Quote:
Originally Posted by Fellro View Post
On my 88 250, I can take the exhaust apart, so I drop it, then after taking the shroud off, I am able to change the pump without dropping the tank... Rear tank is no way to do without dropping, but I have found if I move the exhaust, which on my truck is easy, I can just sit under the truck and take the pump out.
I may try that, since the exhaust needs to be replaced also. Thank you.

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MIA for a couple of days. sorry


You need to pull your throttle body off, and check the gasket.

I have found over time this gasket to fail, and cause the backfire you are talking about.
Usually on the 5.8, and 7.5's
Good to know. Thank you.
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'78 F-150 Lariat

Quote:
Originally Posted by john112deere
I think the lens of time is required to differentiate between the real milestones, and the detours along the way.
Quote:
Originally Posted by mrxlh View Post
Strippers, ammo and SKS, wow, that is almost sig worthy!!
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  #6  
Old 08-01-2017, 07:39 PM
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Since you already dropped the front (midship) you did the one I refer. Rear must come down.
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The beater: 88 F250 4x4, 5.8 5 speed
The project ... 1978 F150 4wd shortbed 351 auto

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  #7  
Old 08-01-2017, 08:03 PM
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This is the exhaust I have on 3 of my gas trucks.
I think you will be VERY happy.

http://www.ebay.com/itm/Ford-F150-F2...-/161530487342

When you order, ask for the cat to muffler pipe to ba added. cost a little more, but worth it

Only welding is the tips to the pipes. everything else is clamps and hangers.
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Last edited by dustybumpers; 08-01-2017 at 08:06 PM. Reason: Dunkin forgot to check my spelling :)
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  #8  
Old 08-01-2017, 10:00 PM
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Thank you, both!
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'78 F-150 Lariat

Quote:
Originally Posted by john112deere
I think the lens of time is required to differentiate between the real milestones, and the detours along the way.
Quote:
Originally Posted by mrxlh View Post
Strippers, ammo and SKS, wow, that is almost sig worthy!!
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  #9  
Old 08-02-2017, 11:23 AM
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Drove the truck for 70 miles last night with no major problems. The truck accelerated okay with no stumbling. It also started and idled with no issues. I switched back and forth between tanks several times. Once again, the engine backfired once when switching from the front to rear tank. This happened when I was accelerating and switched tanks.

I have ordered a throttle body gasket and will replace it.

Thank you all for the tech support and ideas.
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'78 F-150 Lariat

Quote:
Originally Posted by john112deere
I think the lens of time is required to differentiate between the real milestones, and the detours along the way.
Quote:
Originally Posted by mrxlh View Post
Strippers, ammo and SKS, wow, that is almost sig worthy!!
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  #10  
Old 08-08-2017, 09:12 AM
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Getting ready to drop the rear tank. I thought I was going to have to drop the hitch receiver, but I don't think so. Both exhaust pipes go around the tank and over to the passenger side, so I won't have to do anything with the exhaust, I hope. I'm going to replace both the fuel pump and the sending unit.
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'78 F-150 Lariat

Quote:
Originally Posted by john112deere
I think the lens of time is required to differentiate between the real milestones, and the detours along the way.
Quote:
Originally Posted by mrxlh View Post
Strippers, ammo and SKS, wow, that is almost sig worthy!!
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