CAP, Fuel Filler
DESCRIPTION
DESCRIPTION
The plastic fuel fill cap is a threaded/quarter turn onto the end of the fuel fill tube. Its purpose is to retain vapors and fuel in the fuel tank.
OPERATION
OPERATION
The loss of any fuel vapor out of fuel filler tube is prevented by the use of pressure-vacuum fuel fill cap. Relief valves inside the cap will release fuel tank pressure at predetermined pressures. Fuel tank vacuum will also be released at predetermined values. This cap must be replaced by a similar unit if replacement is necessary. This is in order for the system to remain effective.
Remove the fill cap before servicing any fuel system component to relieve fuel tank pressure. If the cap is left off or loose, a Diagnostic Trouble Code (DTC) may be set.
CAUTION:
REMOVAL
REMOVAL
If replacement of the 1/4 turn fuel tank filler tube cap is necessary, it must be replaced with an identical cap to be sure of correct system operation.
Remove the fuel tank filler tube cap to relieve fuel tank pressure. The cap must be removed prior to disconnecting any fuel system component or before draining the fuel tank.
CAUTION: