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-   -   1985 F150 Fuel Problem. Please help!! (https://www.fordforum.com/forum/ford-f-150-14/1985-f150-fuel-problem-please-help-27512/)

Greatwhite1983 07-23-2012 10:58 PM

2 Attachment(s)

Originally Posted by greasemark (Post 72799)
Well, bad news, we don't have one (anymore) that goes back that far. If you can wait a little (day or two), I'll contact Ford and they might be able to send a copy. I'm working on it.

I returned the valve this morning because it was already returned by somebody else before I bought it (it was their only one in stock but it was unused), and the packaging was all screwed up, so I figured if I get one that hasn't been previously bought I will get some info with it. The new one already came and it did come with a diagram of how to wire the new connector. So all I really need now is to know where my existing wires are going. I have one diagram that may be right that's for an 86, but I think it should be the same. Id like to find one more just to confirm that it is right. Here's a pic of the wires that are already on my truck. I just have to be sure to hook the wires on the right spot of the new pigtail because all the wires on the pigtail are black, not color coated.

Greatwhite1983 07-23-2012 11:53 PM

3 Attachment(s)
So, with the research I've done, and help from multiple forums, this is what I have come up with. Let me know if you think I'm wrong. Here's a diagram from a valve the same as mine, a diagram of existing wires, and a picture I edited in paint of where I think my existing wires go (after I get the connector of coarse).

bandit1948 07-24-2012 01:03 PM

there should be a fuel filter on the drivers side back along the frame ! my 96 has it there ! maybe the regulator went to lunch or maybe the throttle body needs to be cleaned out ! someplace on your truck should be a in-line fuel filter because my truck has duel tanks and the filter sits right under the drivers floor board !

Greatwhite1983 07-24-2012 05:36 PM


Originally Posted by bandit1948 (Post 72832)
there should be a fuel filter on the drivers side back along the frame ! my 96 has it there ! maybe the regulator went to lunch or maybe the throttle body needs to be cleaned out ! someplace on your truck should be a in-line fuel filter because my truck has duel tanks and the filter sits right under the drivers floor board !

That truck only has the one filter in the reservoir, a lot of the 85's only had the one and I already replaced it. The trucks running great now, I just have to replace the tank selector valve. I am going to add an inline filter to each tank though.

bandit1948 07-25-2012 09:13 AM

i have a 96 ford f-150 with duel tanks and the filter is under the drivers side along the frame ! is there a splice in the line? i am thinking maybe someone before you took the filter off and put a piece of metal line or hose between the line ! it has to have a filter someplace or dirt would get into the injectors or carburetor ! maybe the filter is in the tank or closer to the engine !

Greatwhite1983 07-25-2012 11:54 AM


Originally Posted by bandit1948 (Post 72856)
i have a 96 ford f-150 with duel tanks and the filter is under the drivers side along the frame ! is there a splice in the line? i am thinking maybe someone before you took the filter off and put a piece of metal line or hose between the line ! it has to have a filter someplace or dirt would get into the injectors or carburetor ! maybe the filter is in the tank or closer to the engine !

No thats not the case. Ive done a ton of research on it. Thats all that truck had then, as I mentioned before, they changed it the next year. Thats why Im adding an inline filter to each tank. The filter in the reservoir is on the drivers side attached to the frame between the high pressure pump and the tank selector valve.

Greatwhite1983 07-27-2012 08:05 PM

I take it nobodies sure if the wiring picture I made is right or not?

grindman 08-03-2012 08:52 PM

just try it and see what happens if it's wrong then you'll know it just be make all the connections without letting them touch one another and make sure your ground is solid:confused:

bandit1948 08-04-2012 09:53 AM

if there is no in-line filter then someone took it off ! my 96 has a in-line filter along the frame on the drivers side ! if you can,t find a filter then cut the fuel line, get a filter and 2 pieces of fuel injection hoses and 4 small screw clamps ! if there is no way of filtering the gas then dirt can get into the injectors ! also check the fuel regulator on the fuel rail, it might be bad ! pull the hose off of it and check for gas ! there should be no gas in the vacuum hose !

Greatwhite1983 08-04-2012 02:05 PM

Im going to a friends in a couple hours to wire/install the new valve, and for the filters, im adding one to each tank. Between the selector valve and the tanks. The valves warranty is void if I dont have them there. As Ive said before Bandit, that year, most of them didnt have them. They changed it in 1986, I have a 1985. Your truck is 11 years newer so of course yours is different. Ill let you guys know if I get the wiring right later on. Thanx for all the help :D


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