What Causes Difficulty in Restarting a Car After It Stalls?
1 Answers
Car stalls and then difficult to start again for the following reasons: Sensor malfunction: Sensor malfunction can cause excessive fuel injection during hot starts while the intake air volume remains unchanged or even decreases, as hot air has lower density. This results in an overly rich air-fuel mixture, making it difficult for the engine to start. Fuel injector aging: Fuel may drip prematurely from the fuel injector into the intake port, leading to an overly rich mixture during startup. The only solution is to replace the fuel injector. Charcoal canister solenoid valve failure: The charcoal canister stores the air-fuel mixture after parking to increase mixture concentration during the next cold start, aiding engine ignition. Normally, the solenoid valve (switch) remains closed during hot starts as assistance isn't needed. However, if the solenoid valve is damaged, the charcoal canister continues to assist during hot starts, directly causing excessive mixture concentration and preventing engine ignition.