is it normal for my tank to have alot of pressure/vacuum in it after driving? may seem a bit noob, but i can't recall my other vehicles doing this. you can actually hear it escaping for the filler cap. is there an issue with EVAP or something?

 

Mine always has. Guess I haven't pursued any remedy.

 

Yes and no. I would be worried if it didn't hiss! Read the warning on the gas cap.

 

it is supposed to build pressure that is part of the "emmission" systems doesnt allow evap gas from reaching the atmosphere... yeah right

 

i guess this is normal then. its got a locking cap, which can't be helping the issue. i was thinking about why my Blazer doesn't do this...it doesn't have a purge valve on the EVAP canister. the pressure just bleeds into the motor. it just didn't seem right when i can smell fuel vapors.