Fuel Tank Pressure?
Thread Starter
Racer
Joined: Sep 2014
Posts: 421
Likes: 34
From: Troy Michigan
Fuel Tank Pressure?
Hello,
Ever since ive had my 87 my fuel tank hasn't been "breathing" properly. The tank builds up pressure and then when I remove the gas cap it blows out for awhile. Does anyone have any ideas where I can look for a possible clog or has fixed this before?
Thank you!
Ever since ive had my 87 my fuel tank hasn't been "breathing" properly. The tank builds up pressure and then when I remove the gas cap it blows out for awhile. Does anyone have any ideas where I can look for a possible clog or has fixed this before?
Thank you!
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
It should do that when the engine is hot, not when cold. Fuel is circulating back and forth from the engine and some gets returned to the tank, this fuel is now heated and expands, building pressure in the tank. Federal emissions requires the system to be closed and under pressure, instead of dumping fumes into the atmosphere all the time.
