fuel smell...stumped - Ford Powerstroke Diesel Forum
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Old 02-20-2008, 04:25 AM
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fuel smell...stumped

if i fill up to the top i smell fuel in the cab. funny thing is noise level drops. clacking/ injectors. after the the first 1/4 tank is gone smell is gone and clacking returns. but there is NO fuel dripping anywhere. where am i getting air in my fuel line??? and why does it stink in the cab without dripping anywhere???

thanks in advance
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Old 02-21-2008, 04:23 AM
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anyone?
bump for me
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Old 02-21-2008, 04:27 AM
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Sounds like there could be a leak on the top of the tank and then when the level drops it starts sucking air, crawl up under the truck and inspect the tank when its full and see if you spot anything.
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Old 02-21-2008, 05:23 AM
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I had this odd experience some time back. To the passenger side rear of the fuel filter is a drain valve, it deposits either to the ground or to the engine valley pan which will look as a rear seal leak, kit from Ford will cure it. One other little glitch is the o-ring pointed out by another on the forum at the fuel booster pump suction connection on the left frame rail, also an air problem at lower tank levels.

It has little to do with fuel level as much as time running after a fill up stop. Aggravating little machines.
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Old 02-21-2008, 05:24 AM
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mayb check ur fuel lines???
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Old 02-21-2008, 06:37 PM
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the drain valve on my water trap dumps from a hose so i can put a bucket under it.
i crawled under chassis on ice and snow to try and find this. air in the line from the quick connects i can fathom. how are the fuems entering the cab. valley is dry.
ERRRRRR thanks for the looks though
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Old 02-22-2008, 05:21 AM
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Sorry for the bad timing of the inspection, fumes can only come in from areas of low pressure during drive; IE heater air intake(windshield vent), the heater box in the engine compartment at the blower motor seal or the box seal, or thru any shrunken cab penetration seals along the firewall. There are flow thru vents at the rear wall of the '99 and up cabs, if the flappers stay open you can get fuel/exhaust odor up thru these as well.

Any fuel show from the drain valve?
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Old 02-23-2008, 03:58 AM
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none from the valve. traced the lines from a to b. thats what has me stumped. gonna filler back up today and search some more.
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