96 300 6cyl belching fuel under hood
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96 300 6cyl belching fuel under hood
My 96 f-150 big six drained about a pint of gas onto the ground out of that black plastic box on the passenger side under the battery yesterday just sitting in the driveway!? Now it is starving for fuel and it even died driving down the highway today. What the heck is that black box with 2 caps on top? Also now there is a wierd stinky sweet smell (not antifreeze) coming from under the hood. It sort of smells like varnished gasoline but I'm not sure what it is. It is pretty hot here in IL could this be a vapor lock problem? Please help 
Thanks in advance!
Thanks in advance!
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Joined: May 1999
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From: Copley, Ohio
The box is the charcoal canister for your evaporative emissions. The only way it should have fuel in it is from a grossly overfilled tank. With a 96 you don't have the tank crossover problem of the earlier models.
Very strange. The fuel that's pouring out of the cannister should be going to the injectors, but there's no direct connection that I can see.
Just for grins pull the vacuum line off your fuel pressure regulator and see if there's gas in there. That's the only place I can think of where fuel could cross over between the two systems.
Very strange. The fuel that's pouring out of the cannister should be going to the injectors, but there's no direct connection that I can see.
Just for grins pull the vacuum line off your fuel pressure regulator and see if there's gas in there. That's the only place I can think of where fuel could cross over between the two systems.
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Joined: Jan 2002
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From: Valencia, California
Strange Ranger...I did have a fuel crossflow problem when my front fuel pump started going dead. Sending unit(s) and gauge are good, I'm possitive it was cross flowing too.
And I did end up having the same problem with the gas spilling out of the canister thingy, as soon as I replaced the fuel pumps the problem was solved.
And I did end up having the same problem with the gas spilling out of the canister thingy, as soon as I replaced the fuel pumps the problem was solved.
Last edited by SPROCKET_X; Aug 17, 2003 at 04:49 AM.
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From: Copley, Ohio
The earlier fuel-injected F150s that had twin tanks with tank-mounted low pressure pumps, in in-line high pressure pump and a tank selector valve experienced a failure in which the system would return fuel to the wrong tank, causing an overflow. By the 96 model year, the design had been changed to eliminate the valve and the common high-pressure pump in favor of selecting between tank mounted high pressure pumps
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From: Ventura, California
Originally posted by StrangeRanger
By the 96 model year, the design had been changed to eliminate the valve and the common high-pressure pump in favor of selecting between tank mounted high pressure pumps
By the 96 model year, the design had been changed to eliminate the valve and the common high-pressure pump in favor of selecting between tank mounted high pressure pumps
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Joined: Jan 2002
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From: Valencia, California
Just another tidbit but I know of 2 other '96s and 1 95 on the "other" site that have also had a fuel crossflow problem directly related to one of the fuel pumps going bad like I had.
