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Old 06-17-2011, 03:35 PM
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Leaking fuel

I have a early 99 7.3 f350 4x4 4 door, i have fuel laying in the intake valley, i cant seem to find were its coming from. there is fuel all the way at the front just behind the filter housing, but i do not see it dripping unless it only drips when its at a higher rpm than idle. I though it was leaking some fuel but i didnt see a drip under the truck, now i know why my clutch started slipping, the fuel ran to the back of the intake out the drain hole into the bellhousing.
i searched the forum butdidnt find the answer i was looking for.
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Old 06-17-2011, 03:47 PM
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Check around the fuel bowl drain valve. (Yellow valve handle on the valley side of the fuel bowl) My O-rings went bad on it and it was leaking. Not real noticably, but enough to have fuel in the valley and the obvious raw diesel fuel smell.

Check the other end of the drain tube to see if fuel is dripping there too. Mine did. The tube end is on the passenger side of the engine near the crank pulley. If you know where to look, you can see through the passenger wheel well.....ok I can anyway. You also may have some O-rings getting weak where the fuel lines come into the bowl.

Just offering suggestions.
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Old 06-17-2011, 04:01 PM
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thanks, i put new orings in the drain valve 2 yrs ago, but that doesnt mean they arent leaking already, i just dont see a drip, theres no fuel coming out of the tube, just on the intake . i just washed it and im gonna blow it dry then probably in the morning, run it at high idle and see if i can see it leaking anywhere.
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Old 06-17-2011, 04:38 PM
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well i couldnt wait till morning, i blew it dry with air ran itat idle, and nothing, i put it on high idle1800, after about 2 min. it dripped from the bottom side of the drain valve. sure thought i would get more than 2 yrs and 25k out of those orings. its an easy fix though.
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Old 06-18-2011, 07:53 AM
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Glad you found it. Sometimes those little leaks are pain in the butt.
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