Warning Signs Your EVAP Charcoal Canister Is Failing
- Check Engine Light: This is the most common sign. The light might come on because of EVAP system leaks or problems.
- Fuel Odor: You might smell gas, especially after filling up your tank.
- Poor Fuel Economy: A bad canister can mess up your engine's fuel mixture, wasting gas.
- Difficulty Starting: In rare cases, a failing canister can cause problems when starting your car.
- Hissing Sound: Sometimes you can hear a hissing sound near the fuel tank, which could be a leak in the EVAP system.
How to Test If This Part Is The Problem
- Visual Inspection: Look for cracks, damage, or loose hoses on the canister and its connections.
- Smoke Test: A mechanic can use a smoke machine to find leaks in the EVAP system.
- Scan Tool: A scan tool can read error codes from your car's computer that point to EVAP system issues.
- Pressure Test: A mechanic can use a pressure tester to check if the EVAP system is holding pressure.
Common Failure Causes For This Part
- Age: Over time, the canister can wear out and become less effective.
- Fuel Contamination: Liquid fuel entering the canister can damage the charcoal inside.
- Physical Damage: Impacts or accidents can crack or break the canister.
- Clogged Vent: Dirt and debris can clog the vent, causing the canister to fail.
- Vacuum Leaks: Leaks in the hoses connected to the canister can cause it to malfunction.
