What are the symptoms of a faulty carbon canister purge solenoid valve in a car?
2 Answers
The symptoms of a faulty carbon canister purge solenoid valve in a car: 1. Gasoline smell inside the car, because when the solenoid valve is damaged, the engine cannot timely draw gasoline vapor from the carbon canister, the activated charcoal becomes saturated and can no longer adsorb, causing the gasoline vapor entering the carbon canister to be unable to be drawn, resulting in a gasoline smell in the air; 2. Jerking during rapid acceleration, because the solenoid valve cannot open, the ECU reduces the fuel injection quantity, leading to a lean air-fuel mixture and insufficient power causing jerking; 3. Difficulty starting the engine, because when the carbon canister purge solenoid valve is constantly open, the fuel tank and the engine intake manifold are directly connected, allowing a large amount of gasoline vapor to enter the intake manifold when the car is parked, resulting in a rich air-fuel mixture when starting the engine, making it difficult to start.
I remember when the charcoal canister purge valve in my old car failed, the vehicle shook like an earthquake at red lights and kept stalling, which really startled me. Fuel consumption skyrocketed – normally a full tank could cover 500 km, but it dropped to only 400 km, costing me significantly more. Sometimes after parking in the garage, I'd notice a strong gasoline smell, raising serious safety concerns. The dashboard warning light was frequently on, and diagnostics revealed it was that small component causing the trouble. If left unrepaired, the engine could easily sustain damage. I eventually had it professionally replaced at a specialist shop. A reminder to everyone: don’t delay with similar issues – fixing it doesn’t cost much.
