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Old 11-11-2012, 12:11 PM
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Help tracking down fuel leak

I walked out to my truck a week or so ago and found fuel leaking underneath it. It's landing right under what I'm guessing is the flywheel access cover behind the bell housing. I got it home and popped the hood with it running and saw a leak off the side of the fpr. I replace the gasket at the fpr screen and thought I had it fixed but alas I'm still leaving a nice puddle of diesel where ever I park. I've been looking around and can't see anything other the fuel in the valley but no idea where it's coming from. Some advice on where to be looking is greatly appreciated.


Edit. I was just under it while running and it looks like its coming down by the starter and right behind/beside the oil pan. Wth???

Last edited by creekfreak; 11-11-2012 at 12:38 PM.
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Old 11-11-2012, 01:58 PM
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O rings in fuel bowl, rubber lines from fuel bowl to pump, the weap hole in the bottom of the fuel pump, or the banjo bolt washers on the back of the pump. Wash the valley out an let it dry, then start it and watch for where the fuel is coming from, you may have to drive it a mile or so then look for the leak
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Old 11-11-2012, 04:29 PM
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Zwat I was afraid of. Ok who can point me to an inexpensive and reliable DIY e fuel system for dummies? I can probably scrape up $3-400 to do it. And really a write up for dummies. I can handle my way around the business end of a wrench just fine but the theory of doing a mod like that is beyond my knowledge base.


Could I get a mod to pull this thread please. I'm finding these topics covered ad nauseum. My apologies.

Last edited by creekfreak; 11-11-2012 at 04:46 PM.
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Old 11-12-2012, 07:40 AM
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What year truck is this? If it is a 96-97, look at the Fuel Restriction Sensor on the driver's side of the fuel bowl (on the FPR block). They love to leak. If it is leaking, you can replace the sensor or just use a 1/8 NPT plug (just don't overtighten it!!!!). The earlier trucks had this sensor on the rear of the fuel bowl near the bottom of the bowl. Almost any leak in the engine valley will eventually drain down the back of the block on the passenger side. Cheers!
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Old 11-12-2012, 08:33 AM
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had the same problem on mine turned out to be the lift pump ran about 150 for a new one took bout a hour to replace dont know if this helps
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