What Causes a Car to Suddenly Stall After Starting?
2 Answers
There are several reasons why a car may suddenly stall after starting: 1. Short circuit in the low-voltage circuit; 2. Damage to the fuel pump or a cracked fuel line; 3. Clogged carburetor fuel inlet or an empty fuel tank; 4. Faulty sensors; 5. Disrupted engine timing system; 6. Issues with the engine overheating and anti-explosion system; 7. Malfunctioning ignition coil or electrical components. Solutions to address sudden stalling include: 1. Check the engine oil lubrication; 2. Inspect if the carburetor vent pipe is blocked; 3. Examine whether the trigger coil has a short circuit under high temperatures; 4. Check for any damage, looseness, or compression in the fuel line's negative pressure tube and fuel pipe.
Experiencing sudden engine stalling after starting the car is not uncommon—I've been driving for over a decade and frequently encounter similar situations. One of the most common causes is issues with the fuel system, such as an aging fuel pump failing to deliver pressure or clogged fuel lines, especially when the fuel filter is dirty and prone to blockage. The ignition system shouldn’t be overlooked either—spark plugs can accumulate severe carbon deposits after years of use, leading to misfires, while ignition coil leakage is also a frequent culprit. Restricted air intake is another factor; for instance, carbon buildup in the throttle body affects airflow, and ECU control failures can cause stalling. Faulty sensors, like the crankshaft position sensor or idle control valve, sending erratic signals can also trigger this issue. I recommend paying close attention to the car’s condition during each startup. If abnormalities are detected, inspect immediately—check for loose fuses or connections and attempt basic troubleshooting if possible. Otherwise, promptly seek professional assistance. Regular maintenance, especially for older vehicles, is crucial to avoid breakdowns on the road.
