Fuel Tank Pressure

[Dynomite]

Originally Posted by Schrade

On LT1 top end rebuild, I was greeted on second day by steady drip of fuel from disconnected lines, whereas it was NOT dripping shortly after dis-connecting the first day.

That is the secret when disconnecting the fuel lines from the fuel rail.
Loosen the gas cap and no dripping fuel from the fuel lines

[scottfab]

Originally Posted by mike100

^^^ yes...and the carburetor that gets 100 mpg...

....snip.....

Kinda related. Kinda not.

100mpg Cars are here

[WARP TEN]

Originally Posted by fletchusmc

My 95 has a lot of pressure as well when I remove the fuel cap, interested to see if this means anything?

Mine too. Seems like pressure, not vac. --Bob

[scottfab]

Originally Posted by WARP TEN

Mine too. Seems like pressure, not vac. --Bob

Well, I don't get a pressure build up on mine. Maybe it's time to visit the FSM at page 6E3-C3-2.
At the bottom it speaks to "FUEL TANK PRESSURE CONTROL VALVE" and on subsequent pages shows that valve, operation theory and the Evaporative Emissions Control System Schematic.
Maybe the fuel tank vapor pressure is not getting relieved?

[mike100]

I know on mine I often hear the whoosh of a lower pressure in the tank and outside air going in- which tells me the evap system and purge solenoid are working on mine.