Sometimes when the gas cap goes bad it will cause pressure in the tank,also you need a little bit of pressure in the tank,or the car wont run correctly,like if you leave the gas cap off after filling up with gas.
We've changed the fuel pump, pressure regulator, gas cap, and had a tune up and the pressure is still building...What else can it be?
My '85 builds up pressure especially when the fuel drops below a 1/4 of a tank, it's always done that so I take it as normal.
A Breather Cap within the guidelines of Manufacturers Specifications
To prevent moisture build up.
because the gas cap is bad, it will not build pressure in the tank, nothing major, but will cause an annoying light.
Fuel system cleaner should be added to your tank before filling up with gas.
if tank is pressurizing, clean the fuel tank capthses are supposed to be vented to eliminate pressurizingif that doesnt work, buy a new vented capcheck your evap system.
drop in a fuel system cleaner, and fill up your tank. there is a lot of sludge that can build up in the tank, and it can cause the sensor to get suck!
No, automotive tire fillers will not have enough pressure to refill a HPA tank.
The vent is blocked.
If you keep an almost empty gas tank, residue can build up and clog up your gas tank. Other than that, a parked car doesn't use gas, unless your car is left idleing, (with an almost empty tank). Then, the gas stays in the back part of the tank and the gas could'nt get to the carburator, so the car would, in effect, run out off gas.