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So I got an 89 F150 XLT with a 351w in there and Ive been havn trouble with figurn out what to do with the tanks cause the rear one works just fine but when i use the switch it switchs the guage but the tank doesnt switch and it still draws from the rear ive changed the switch on the dash and tapped the switcher itself from under the truck with a hammer to try and release it bein stuck or sumn but that didnt work neither if ya fellas know anythn id be much appreciated if ya let me know
Last edited by LYXLTLariat; Apr 23, 2022 at 05:12 PM.
Does the pump in the front tank turn on when selected? It is the fuel pressure from the selected tank that causes the DFR to change position. If the pump does energize then it could still be that the reservoir is stuck drawing fuel from the rear tank. That was my experience when I bought my truck that had been sitting for almost a decade. Even though the pump was running it could not move the stuck valve. I replaced the DFR with a junkyard part.
How can I tell if the pump is goin and I don't know if yer near by where I am but if ya know of any selector valves I'm havn quit a trouble findn one by the way thank ya for helpn me out
I did what ya said and the guage is completely all the way at the end of the full mark I was gonna siphon it out to see if the guage went down but havnt gotten to it yet but I couldn't here the pump go but it seems like it didn't even try to switch
I went and did what ya said and i couldn't hear nuthn so I switched it to rear and listened and i could hear it pumpn back there, but I couldn't hear nuthn from the front so im guessn that means the pumps bad, I've checked the connection for the electrical it looks fine the electrician jelly is prty old but that shouldn't cause it, should I check the electrical lines from the pump to the truck?
Last edited by LYXLTLariat; Apr 24, 2022 at 09:24 AM.
I replaced the fuse cause the old one had no connection whatsoever and had my brother turn her to run and I heard sumn down there, so I think shes good ill take her out later today
Last edited by LYXLTLariat; Apr 24, 2022 at 10:22 AM.
I was drivn and its drawn from the front tank now but the guage only works when the trucks off it says it over filled when it on but when it's off it says about 3/4 which before I drove it today it said it was overfilled while off to so I know it's drawn from there but it ain't workn while she's on its probly the sending unit but I would really not like to go down there and pull the tank and put in a new sending unit just yet do ya know of any way to fix it without goin pulln the unit and replacing it
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Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
