Pontiac Problems? Ask a Mechanic for Answers ASAP
The next step is to do the following test.
1. Disconnect the electrical connector from the purge solenoid. 2. Disconnect the vapor line that goes to the charcoal canister from the purge solenoid. 3. Start the engine. 4. Test for vacuum on the open port on the purge solenoid. There should be no vacuum. 5. If vacuum is detected, the purge solenoid is defective.
Number 11 is the line to disconnect from the solenoid, you will no this is the one because you will see a service port with a green cap on that line. Then you will be checking for vacuum on the solenoid it self with the engine running and the electrical connector on the solenoid unplugged. If there is vacuum you will feel it there with your finger. It will try to suck your finger into the solenoid (it can't) but you feel suction there.
The vent solenoid is at the rear.
1 - Fuel Tank2 - Fuel Pump and Sender Assembly3 - Fuel Tank Pressure Sensor4 - Evaporative Emission (EVAP) Canister Vent Solenoid Valve5 - Evaporative Emission (EVAP) Canister
The vent solenoid is at the back, when you energized it. The solenoid should click normally and a vacuum pump should hold vacuum at the port of the solenoid. If it doesn't hold vacuum the solenoid is bad.