1996 F250 5.8 fuel leak mystery
#1
08-21-2015, 04:38 PM
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1996 F250 5.8 fuel leak mystery
I think I've posted a trend about this same problem a few months ago but never got many replys and I have not been driving the truck much, but my problem is that every now and then the truck will be hard starting when warm and sputter for a second and then runs perfectly while having a strong gas smell in cab which goes away after about a minute, now I've had someone start the truck while I look under the hood and I can't see any visible leaks at all, and like I said it seems to only happen when the engine is warm, any thoughts?
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01-22-2016, 05:44 PM
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I think I've posted a trend about this same problem a few months ago but never got many replys and I have not been driving the truck much, but my problem is that every now and then the truck will be hard starting when warm and sputter for a second and then runs perfectly while having a strong gas smell in cab which goes away after about a minute, now I've had someone start the truck while I look under the hood and I can't see any visible leaks at all, and like I said it seems to only happen when the engine is warm, any thoughts?
#4
01-22-2016, 06:08 PM
Hotshot
#5
01-22-2016, 06:23 PM
Keep in mind I only get the gas smell in the cab when after the engine is warm and started again not long after
Two of mine suffered what sound like the same thing, I could smell fuel in the cab or standing next to the truck but only after it had been running but could see no leak anywhere.
In both cases I found a pin hole sized leak, one the rail itself rusted through the other the FPR was leaking.
Both sprayed an invisible almost undetectable yet steady stream of fuel onto the motor, nothing large enough to create a wet spot/puddle, small enough leak the engine heat instantly turned it to vapor allowing me to smell it but not see it.
First one I had to replace the rail, the other new O rings on the FPR corrected the problem.
Leaks where both rather hard to find nothing you'd ever find/see just by looking at it while running, you'd swear it didn't have a fuel leak. I found them both by feeling around with my bare hand, only way I could detect the leak was the stream hitting my hand.
Two of mine suffered what sound like the same thing, I could smell fuel in the cab or standing next to the truck but only after it had been running but could see no leak anywhere.
In both cases I found a pin hole sized leak, one the rail itself rusted through the other the FPR was leaking.
Both sprayed an invisible almost undetectable yet steady stream of fuel onto the motor, nothing large enough to create a wet spot/puddle, small enough leak the engine heat instantly turned it to vapor allowing me to smell it but not see it.
First one I had to replace the rail, the other new O rings on the FPR corrected the problem.
Leaks where both rather hard to find nothing you'd ever find/see just by looking at it while running, you'd swear it didn't have a fuel leak. I found them both by feeling around with my bare hand, only way I could detect the leak was the stream hitting my hand.
#6
01-22-2016, 06:27 PM
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Keep in mind I only get the gas smell in the cab when after the engine is warm and started again not long after
Two of mine suffered what sound like the same thing, I could smell fuel in the cab or standing next to the truck but only after it had been running but could see no leak anywhere.
In both cases I found a pin hole sized leak, one the rail itself rusted through the other the FPR was leaking.
Both sprayed an invisible almost undetectable yet steady stream of fuel onto the motor, nothing large enough to create a wet spot/puddle, small enough leak the engine heat instantly turned it to vapor allowing me to smell it but not see it.
First one I had to replace the rail, the other new O rings on the FPR corrected the problem.
Leaks where both rather hard to find nothing you'd ever find/see just by looking at it while running, you'd swear it didn't have a fuel leak. I found them both by feeling around with my bare hand, only way I could detect the leak was the stream hitting my hand.
Two of mine suffered what sound like the same thing, I could smell fuel in the cab or standing next to the truck but only after it had been running but could see no leak anywhere.
In both cases I found a pin hole sized leak, one the rail itself rusted through the other the FPR was leaking.
Both sprayed an invisible almost undetectable yet steady stream of fuel onto the motor, nothing large enough to create a wet spot/puddle, small enough leak the engine heat instantly turned it to vapor allowing me to smell it but not see it.
First one I had to replace the rail, the other new O rings on the FPR corrected the problem.
Leaks where both rather hard to find nothing you'd ever find/see just by looking at it while running, you'd swear it didn't have a fuel leak. I found them both by feeling around with my bare hand, only way I could detect the leak was the stream hitting my hand.
#7
01-23-2016, 07:38 AM
I'm with RLA2005 on this one:
I have a 96 F250 5.8. I began smelling gas in the garage. I checked all my gas containers, lawn mowers, trimmers etc. and could never run it down. It ended up being my rear fuel tank. It had developed a small pin hole rust leak behind one of the straps that hold it in. The leak was small enough that the gas never reached the ground before it would evaporate but you could sure smell it. It also has a plate and spare tire between it and the ground which helped to hide the leak from me.
Replaced the tank (while your in there replace the pump too), fixed it! I was surprised that such a small hole made such a big smell.
Mike
I have a 96 F250 5.8. I began smelling gas in the garage. I checked all my gas containers, lawn mowers, trimmers etc. and could never run it down. It ended up being my rear fuel tank. It had developed a small pin hole rust leak behind one of the straps that hold it in. The leak was small enough that the gas never reached the ground before it would evaporate but you could sure smell it. It also has a plate and spare tire between it and the ground which helped to hide the leak from me.
Replaced the tank (while your in there replace the pump too), fixed it! I was surprised that such a small hole made such a big smell.
Mike
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01-23-2016, 08:35 AM
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