Reasons Why a Car Stalls Immediately After Starting
1 Answers
The reasons why a car stalls immediately after starting can be summarized into the following 5 points: 1. Carbon deposits: Cold starts cause low engine temperatures, making fuel harder to evaporate and vaporize. If carbon deposits in the fuel system, intake manifold, etc. are severe, these deposits will first absorb some fuel vapor, leading to an overly lean air-fuel mixture entering the cylinder for combustion. This can result in unstable idling and stalling immediately after ignition. If the engine is started multiple times, the carbon deposits will saturate with fuel vapor, allowing the air-fuel mixture entering the cylinder to meet the standard and enabling a successful start. However, frequent short-duration multiple starts can reduce battery life, so caution is advised. 2. Fuel and air issues: A faulty fuel pump may suddenly jam or malfunction, causing the pump to rotate insufficiently or stop, leading to insufficient fuel supply and stalling. Alternatively, low fuel system pressure due to a weak fuel pump, fuel line leaks, insufficient electrical current, or a damaged fuel pressure regulator can also cause insufficient fuel supply. Additionally, clogged or leaking fuel injectors can result in poor atomization, leading to insufficient fuel supply and stalling. 3. Ignition issues: Problems with components like the ignition coil, spark plug wires, or spark plugs can cause insufficient ignition energy, leading to stalling. 4. Electrical supply issues: Even if the engine is otherwise normal, faults in the starter or battery can make it difficult or impossible to start the engine. Examples include a battery with broken cells, a stuck starter relay, or a nearly dead battery. 5. Engine control issues: A faulty crankshaft position sensor or sensor failure can prevent the control unit from receiving speed and position signals, making it unable to properly control fuel injection and ignition. This can result in non-functioning fuel injectors.
