Why does the car engine shake and stall when starting?
3 Answers
The reasons for the car engine shaking and stalling when starting are: 1. Dirty throttle body. 2. Faulty spark plugs. 3. Engine cylinder not working. 4. Aging rubber components inside the engine mounts and transmission mounts. Here is some relevant information about car engines: 1. The car engine is the device that provides power to the vehicle, determining its performance, fuel efficiency, stability, and environmental friendliness. 2. Car engines are categorized into diesel engines, gasoline engines, electric vehicle motors, and hybrid motors. Among these, gasoline and diesel engines are both types of reciprocating piston internal combustion engines, converting the chemical energy of fuel into the mechanical energy of piston motion to deliver power output.
My car has also experienced engine shaking and stalling during startup before, which was really frustrating. I asked a mechanic, and they said it might be due to worn-out spark plugs or excessive carbon buildup causing poor ignition, and replacing the spark plugs solved the problem. Insufficient fuel supply from the fuel pump could also trigger this issue, so check if the fuel line is clogged. Additionally, loose battery terminals can cause unstable power supply—tighten them up. It's recommended to start with simpler checks, like replacing the air filter or spark plugs, before jumping into major repairs. Ignoring this long-term can increase engine wear and shorten its lifespan, so regular maintenance is best for prevention.
Engine stalling upon startup is quite common, and I've seen numerous cases over years of driving. Most issues stem from ignition system problems, such as worn spark plugs or faulty high-voltage wires, causing weak sparks and engine shuddering. Alternatively, clogged fuel injectors may deliver insufficient fuel to maintain RPM. Carbon buildup on the mass airflow sensor can also cause uneven air intake. Personally, cleaning the sensors once significantly improved performance, but neglecting repairs risks damaging the catalytic converter – safe driving demands prompt attention.
