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Cause of high fuel vapor pressure?? [Archive] - StangBangerz Forums
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Pitviper1996
04-17-2007, 04:44 PM
have a 94 gt and everytime i get gas and take off my gas cap theres alot of hissing when i unscrew it due to major vapor pressure what can this be caused from and will it harm anything?
Jeff88coupe
04-17-2007, 06:18 PM
Heat in the fuel system is the biggest reason...but no...it will not harm anything. The fact that you hear it hiss when you take the gas cap off means everything is working correctly.
Pitviper1996
04-18-2007, 12:40 AM
well only reason it concerned me was because it isnt a slight hiss it slmost seems if i didnt take it off slowly the damn cap would go flying
80 hate
04-18-2007, 05:19 PM
Is it the stock gas cap?
Pitviper1996
04-18-2007, 10:13 PM
no i bought a new one and put it on there