gasoline fumes in garage with car not running

[pazcarguy]

I have a 66 289 coupe that I bought a few years back that was built for 1/4 mile racing. It has a healthy 11.5 to 1 CR 289 and the previous owner put a Holley blue fuel pump on it, a non-bypass Holley 12-803 fuel pressure regulator and a new tank with a different pickup (a 1/2" copper line drilled and soldered into the side of the new tank) that allowed fuel to be drawn from the bottom of the tank via a 1/2 " separate fuel line that was inserted to almost the back of the tank. I installed a Holley 12-803 Bypass fuel pressure regulator and used the stock fuel line as the return that the previous owner left in place and capped off. Doing this made the fuel pump quieter but now after filling the tank with 10 gallons of gas I have this horrible gas smell all throughout the garage. I looked very carefully under the car with the electric fuel pump off and turned on for any leaks or wetting and have found none, just the horrible smell. It is difficult to determine where it is coming from as everything smells and I was wondering if by installing the bypass type regulator I have now "aerated " the fuel via the stock return line and this is why it smells. I have a new gas cap installed and once again, have no leaks or 'wet" fittings. This problem did not exist with the same setup without the return line only after I made this change. Any suggestions? Brian

 

[66Runt]

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[65fastbackresto]

My garage smelled funny too

I poking around in the trunk yesterday and kept noticing a gas smell, whick I had smelled a few times but could never find. I got under the car and the rubber hose fromt he tank (like 3 inches long) to the steel gas line looked fine, but I squeezed it and it busted on me, dumped about a gallon out before I could get it capped off.

The line LOOKED good, but after about $1.25 worth of parts, my smell is gone.

 

[pazcarguy]

What are you doing for a tank vent? With all the extra fuel moving around while the vehicle isn't, you maybe creating excessive vapor and pressure.
You might check the oil level on the dipstick to make sure you aren't washing the walls and filling your crankcase.
Make sure you don't have any lawn mower gas cans, etc., hanging around with a missing cap.

I do not have a vent for this system as I was not aware I needed one. I have not checked the dipstick for gas in the oil but I do have the new regulator set to 6 1/2 to 7 psi, just as the old one. The engine only has about 20 hours on it and I don't expect to find gas in the oil.

 

[pazcarguy]

I poking around in the trunk yesterday and kept noticing a gas smell, whick I had smelled a few times but could never find. I got under the car and the rubber hose fromt he tank (like 3 inches long) to the steel gas line looked fine, but I squeezed it and it busted on me, dumped about a gallon out before I could get it capped off.

The line LOOKED good, but after about $1.25 worth of parts, my smell is gone.

I bought all new rubber fuel line and replaced it prior to filling up with 10 gallons of gas

 

[D.Hearne]

If it's got the stock tank, it's vented, many were vented thru the gas cap. All tanks have some sort of venting system, otherwise the fuel would stop running once enough vacuum built up in the tank.