Rags66
Aug 18th, 08, 7:06 PM
It seems when I have a half tank of gas or more and park my car in the garage after driving it, I get a fairly strong smell of fuel. There's no leak anywhere that i can see, No wet fuel hoses or connectors and no fuel on the ground. Only a smell for a few hours after I park it. Is it boiling out of the carb, is it venting from the tank? Is this normal?
Malibu70
Aug 19th, 08, 12:52 AM
I have the same symptom, and in my case it is the tank fuming through the vented cap. It seems the tank builds up pressure due to heat absorbed from hot air flowing under the car and from the exhaust pipes nearby. I've replaced the tank, the rubber lines, and fuel pump, but the only improvement came from switching to a sealed gas cap. Unfortunately that causes problems for the pump trying to suck fuel from a sealed tank.
Some fuel smell will come from a hot carb boiling off a little fuel into the venturis. The summer blend of fuel should reduce this effect somewhat, but using old winter-blend fuel can cause fuel evaporation problems in the summer.
Rags66
Aug 19th, 08, 10:43 AM
That makes sense to me, maybe I'll crack open the cap before puting the car away in the garage to vent any pressure build-up.
bone z
Aug 19th, 08, 12:29 PM
you should have a non vented cap on yours because your vent is a loop that goes up in the trunk and back out under the car make sure its not blocked its sticks up by inner fender well on right side the other thing like mine had was a crack by the filler neck that i could not see the gas would dry before you could see it look for stains a round neck on top
Smittie
Aug 19th, 08, 11:52 PM
you should have a non vented cap on yours because your vent is a loop that goes up in the trunk and back out under the car make sure its not blocked its sticks up by inner fender well on right side the other thing like mine had was a crack by the filler neck that i could not see the gas would dry before you could see it look for stains a round neck on top
Yup, check the filler neck where it meets the tank, chances are that is your source.
Tino
Aug 20th, 08, 7:47 PM
Also check the condition of the small pieces of rubber hose that connect the fuel lines to the tank.
Dave Hopkins
Aug 20th, 08, 8:46 PM
I don't know what year they started it but in '72 like I have IF the car was air conditioned it had a return line to the fuel pump on the right side of the car, right next to the main line only smaller. Common that folks have changed to a generic fuel pump and left that line dead ended. If so it needs to be capped!