Fox T-Bird/Cougar Forums

Technical => Engine Tech => Topic started by: jcassity on March 01, 2014, 08:48:28 AM

Title: gas smell only when tank is full
Post by: jcassity on March 01, 2014, 08:48:28 AM
what is the probable fault when the following happens....

when the tank is filled up......
>there is a very strong gas oder till you use up some gas, the smell will go away eventually like in 50 or so miles.
>there are no leaks on the ground
>there are no wet areas along the fill tube
>there is no wet spots aroudn the tank grommet
Title: gas smell only when tank is full
Post by: vinnietbird on March 01, 2014, 09:03:51 AM
The top gaskets could be leaking just a bit. That's what happened to mine. replaced the gaskets and good to go.
Title: gas smell only when tank is full
Post by: TOM Renzo on March 01, 2014, 06:37:52 PM
Put smoke on it to find the leak Or check the roll over valve if the tank does not have a hole in it!!! And check all the evap hoses and fuel lines for ROT
Title: gas smell only when tank is full
Post by: Haystack on March 01, 2014, 08:30:14 PM
X2.

My tbird did this when I first bought it. crawled under it one day and realized the charcoal canister was missing the vac line. hooked it back up, and good as new.
Title: gas smell only when tank is full
Post by: jcassity on March 02, 2014, 10:00:33 AM
if i modify a gas cap , with air fitting ,,
couldnt i add a few lbs of air and listen? 

i cant figure out how to do the smoke thing,, i didnt make one of those smoke tools you did tom.

our tanks have 4 attachment points,, so im not sure where this roll over valve its you mention..?
the fill kneck
the fuel pump
the fuel sendor
the emissions vac to charcoal canister.