GM 12581282 Valve Assembly, Evap Emission Canister Purge Solenoid

The EVAP system in a car is desigend to trap and hold fuel vapor from the fuel tank and intake manifold. It comprises a canister filled with charcoal and several lines that connect it to the throttle body, the fuel tank, and the atmosphere. Typically, this canister is positioned under the vehicle near the fuel filter. Fuel vapors are collected when an engine is off from different parts such as intake manifold, throttle body and fuel tank they are stored at the canister. In case of operation of the engine these fuels are pushed out of canister into combustion by an airflow during purge process via charcoal. The purge valve solenoid which is used to open or close a mechanically actuated valve called a purge valve, was present on some older models; its place among other components has been standardized on today's vehicles. Rarely does EVAP system fail but old vehicles may have leaks causing loss of fuel vapour hence leading to environmental concerns alongside wastage of oil products. Obvious signs of malfunctions include smells of gasoline along with bad idle wether stalling or reduced drivability that could be accounted for by problems related to purging valves gone wrong, broken tanks, cracked hoses or wrong hose connections. There may be difficulties with finding leaks because there is so much tubing and ducting in this system but look underneath the vehicle might reveal obvious problems like leaking tubes therefore if you cannot find where they coming from then it would be better for you to get a professional pressure test done on your system. If diagnosed diagnosis , components in question including EVAP canister purge valve, EVAP vent valve, evaporation (EVAP) canister or fuel tank pressure sensor etc., most times that replacement can usually be carried out by following relevant procedures for removing & installing them at home though sometimes requires experts in repair works only.

EVAP Purge Solenoid Valve Removal involves removing the engine cover, disconnecting the electrical connector from the valve, disconnecting the hose, unscrewing the bolt and removing the purge valve from the upper intake manifold. Installation is simply the reverse of removal. For EVAP Canister Removal, raise the vehicle and support it securely on jackstands. Then, disconnect the hoses from the canister, disconnect the electrical connector from the canister vent solenoid valve, remove the fasteners securing the canister, and remove the canister. Installation is again the reverse of removal.

When conditions are right, the Powertrain Control Module (PCM) opens the canister purge solenoid, allowing vapors to be drawn into the intake manifold and consumed by the engine.

The fuel tank pressure sensor monitors the tank's pressure and communicates with the PCM during leak tests.

To remove the EVAP canister vent solenoid, start by disconnecting the electrical connector and quick-connect fittings from the solenoid. Then, remove it from its mounting bracket.

To remove the EVAP canister vent solenoid, start by disconnecting the electrical connector and quick-connect fittings from the solenoid. Then, remove it from its mounting bracket.

Raise the vehicle and support it securely on jackstands. Disconnect the hoses from the canister and disconnect the electrical connector from the canister vent solenoid valve. Remove the fasteners securing the canister and then remove the canister.