Can a faulty purge valve cause an EVAP leak?
If it allows the gas to go into the engine too soon, it will create too rich of mixture, and make the car hard to start, and/or idle poorly. So it was a reasonable guess to replace the purge valve. And a faulty purge valve could cause a evap leak code.
What happens if you have a bad EVAP vent?
If the EVAP vent solenoid breaks or develops any vacuum leaks, it can hinder the operation of the entire system. This may result in a failed emissions test, which will have to be addressed before the car can be legally driven on the road.
When does an EVAP valve need to be replaced?
When there is no signal (no power) the valve should be closed (cant blow through it). When you apply a 12 volt power source and ground the valve should open with a discernible click. If the valve does no perform this way it is bad and needs to be replaced.
What are the symptoms of a bad EVAP vent solenoid?
Symptoms of a Bad or Failing Evaporation Vent Solenoid. 1 1. Check Engine Light is on. One of the first symptoms of a problem with the EVAP vent solenoid is an illuminated Check Engine Light. If the computer 2 2. Pressure in the gas tank. 3 3. Failed emissions test.
Why is the drain valve closed on my Subaru Impreza?
The drain valve solenoid is closed by the ECU at certain times, to diagnose leaks in the evap system. It looks like its supposed to be open normally to allow fresh air to enter and exit the canister. Use the test mode plugs to check the drain valve for operation.
Where is the drain valve on a Subaru Forester?
I spoke to a Subaru parts supplier that I’ve used for the last few years and he suggested, after talking to a tech, to replace the Canister Vent Valve also known as the Drain Valve, P/N: 42084FA120. This is in the back behind the passenger rear wheel underneath the car for the 1999-2004 Subaru Impreza (includes the WRX and STi) and Forester.
Where is purge valve solenoid located on Subaru Impreza?
The fix was to replace Purge Valve control solenoid, P/N: 16102AA080 (16102AA490 for ’05-’07) – located under the intake manifold on the passenger side of the engine. This part is the same as on a ’97 Legacy that I recently had, so it’s a common part that Subaru has used for years.
What causes a Subaru Impreza to stall after starting?
If the purge solenoid sticks open it draws vacuum on the canister all the time when the engine is running. It also allows fuel vapors from refueling to enter the engine right after starting, which makes the fuel mixture too rich. It basically floods the engine, which could cause it to stall.