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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old Jul 11, 2003 | 10:55 AM
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Question gas tanks

Hey has anyone out there done this I have a 91 f150 4x4 with dual tanks Can i remove the front one and block off the lines to the front is this possible and do they sell any kind of block or something to block the lines it has a 5.8 liter fuel injected
 
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Old Jul 11, 2003 | 11:06 AM
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gas tanks

I did that on this truck. Here's a shot of the "dual-function reservoir" with a red cap on the unused port.
 
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Old Jul 11, 2003 | 12:53 PM
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Thumbs up gas tanks

Awsome and thank you for the info let me ask you this where can i get the cap for the port is it special or did u make one again thank you for you help on this
 
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Old Jul 11, 2003 | 01:48 PM
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gas tanks

I think that came off the new fuel filter I bought, but you can use any rubber vacuum cap. It's not very important because (if the mechanism is working right) no fuel will ever flow out of either of the unused ports. I just did that to keep dust out.
 
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Old Jul 11, 2003 | 02:42 PM
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gas tanks

Hey thanks alot for your help i really appreciate it
 
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Old Jul 11, 2003 | 03:12 PM
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gas tanks

Make sure you route the remaining tank through the top fittings on the dual function reservoir. Because of the known problems with this valve, it is safer to do this. If the valve sticks at all when using the rear tank, fuel could be routed through the return line for the rear tank. The Front tank is the normaly most heavily used and the front tank position of the reservoir is the best seated. I did this mod on a 87 with dual tanks after removing the front tank because of rust. I routed the rear tank to the front tank ports on the reservoir.
 
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