ok so the guy i bought my truck from said the rear tank didn't work right. it wouldnt run well so he had a shop put a pump in it. same issue. a few days ago i tried it to see what would happen. it ran ok until i hit a hill at wot then it would chug and sputter. well i thought i would try to siphon gas out of it to see if maybe it was out of gas. well its NOT i loosen up the the gas cap an o boy a flammable Niagara falls everywhere. it did that for about 12 seconds. so my assumption is the front tank is putting fuel in the rear tank. usually that's a bad selector valve right? and isnt it right on the frame well? i didn't see one . i see a fuel filter and a newer line that goes straight to the engine. the switch itself on the dash is working as well. i am confused....please help its a 93 f150 with a 302
fuel selector problems
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so i guess no body has an idea?
Is this a ford??
as stated above its a 93 f150 302. so yep its a ford
Its the check valves on top of the tanks. You need to replace them.
rand if you have nothing to contribute please don't post. taking threads off topic is also rude. if you want to talk manners post in the off topic section about it.
It's the selector valve, the fuel return is putting all the excess return fuel from the FI system into the rear tank. Not sure if there's more than 1 valve, my '89 diesel F-450 only has one selector valve (fortunately working fine). Seems E10 is hard on them, o-rings swell shut, etc.
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which tank check valve would be bad? there is also a fdm right? could it be at fault?
so i went for a drive for the first few minutes the rear tank works fine and then at hard acceleration it starts bogging out. switch it then a few minutes later it'll be fine again for a a few more minutes. when it bogs down and you keep your foot in it itll actually pop under the hood. what could be wrong? atleast if both tanks function correctly i can switch back and forth and avoid overfilling one. i also think the rear tank dumped some in the front. the front tank went up on the gauge and the rear went down both a noticeable amount.
The tank selector valve not only is supose to switch pressure lines to the fuel system but also return fuel to the proper tank. sounds like if all the lines are properly routed as they are suppose to be hooked up then the tank switching valve must not be lining up correctly to send fuel to engine and return fuel to tank.
could i just bypass the rear tank?
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