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Old 01-07-2021, 11:45 AM   #1
upon1
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Fuel smell

I’ve got a 5.3 in my ‘55 and am getting a strong fuel smell when parked in the garage. No leaks anywhere, triple checked everything. I have an rci fuel cell with a k&n type breather on it and tuning a return style system with braided nylon hose front to back. Has anyone had this issue with this type of fuel hose?
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Old 01-07-2021, 11:55 AM   #2
ls1nova71
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Re: Fuel smell

I have heard of a lot of people saying they get gas smell with regular braided line. I believe you need to use PTFE line to avoid it.
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Old 01-07-2021, 11:26 PM   #3
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Re: Fuel smell

The filter on the tank is just keeping dust out

If you have a k&n filter on a gas can will.it emit fuel smell.. yeah, fuel pfte might be great, but wont fix your problems.. prob need to run a vent line like to engine bay so vapors can condense and return to tank.

I have an 87 r10, l83 swap, used stock vapor line to engine bay for vent/roll over valve and is left open. Zero fuel smell using aeroquip e85 rubber fuel safe hose and aluminium line elsewhere. Truck sits in garage for for weeks at a time :/

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Old 01-08-2021, 05:36 PM   #4
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Re: Fuel smell

I would be willing to bet the gas smell is from the tank vent. Easy to check. Just take the vent filter off and plug the vent. And let it sit overnight? if you aren't going to drive it. If you don't have any smell you found the source of the smell.
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Old 01-18-2021, 12:28 AM   #5
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Re: Fuel smell

Quote:
Originally Posted by LS short box View Post
I would be willing to bet the gas smell is from the tank vent. Easy to check. Just take the vent filter off and plug the vent. And let it sit overnight? if you aren't going to drive it. If you don't have any smell you found the source of the smell.
Just dont run the truck with the vent plugged or you will suck the tank, sounds stulid, but just happened to a coworker on his chevelle build.
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Old 01-12-2021, 04:56 PM   #6
1971Stepside
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Re: Fuel smell

I read a lot of guys were getting the gas smell running the braided line. I ended up running braided from the rail to the frame and then ran a solid line to the back of the truck and used braided to hook to tank. I have a vent on my tank with no smell.
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Old 01-24-2021, 06:42 PM   #7
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Re: Fuel smell

I doubt it's the hose, fuel vapor needs somewhere to go. My '53 with a 5.3L had the same problem and my wife absolutely beat me up over it. Pre-emissions vehicles had charcoal canisters that contained the fuel vapor and they always had a long run of fuel line to get there and back. Remember fuel vapor is heavier than air, so when it "burps" its just sending into your garage and dispersing on the floor right now. My solution was to create a vent line, which runs from the filler neck, to a high loop in the cab corner (stock tank), then down through the floor and to the back of the frame. At the end I put a regular old inline clear plastic/paper fuel filter. That was enough volume to contain the vapor when the garage heats up, or when I come back from a drive, etc. NO MORE SMELL AT ALL. In your case you could run a vent line from the tank, or plug that and do I like I did.
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