What are the reasons why a car cannot run?
2 Answers
The reasons why a car cannot run: 1. The ignition timing advance angle of the cylinder is inaccurate; 2. The spark plugs are not working or there is a cylinder misfire; 3. The fuel supply system is not smooth or blocked, and the fuel pump has an air leak; 4. The clutch engagement is incomplete or the clutch has damaged rivets causing eccentric engagement; 5. The engine crankshaft clearance is too large; 6. The clearance between the output shaft and the differential is too large or damaged; 7. Check for any cracking or backfiring sounds. If present, it indicates the air-fuel mixture ratio is too rich or too lean, and the mixture ratio should be adjusted; 8. The fuel injectors are too dirty or the carburetor is too dirty. For fuel-injected cars, clean the injectors. For carbureted cars, disassemble and clean the carburetor and adjust the fuel level.
As a seasoned driver with over 20 years of experience, I've seen many cases where cars can't accelerate properly. The most common issues are engine-related, such as aging spark plugs, faulty ignition coils, or weak fuel pumps, which lead to incomplete combustion and directly reduce power output. Transmission failures are another critical factor – clutch slippage or gear wear prevents power from reaching the wheels. Additionally, exhaust system blockages, especially a clogged catalytic converter, can make the engine feel like it's suffocating. Many drivers overlook brake system drag issues too; seized brake pads force the wheels to rotate against braking resistance. Tire problems shouldn't be underestimated either – low pressure or misaligned wheels increase rolling resistance. For a complete solution, I recommend first checking diagnostic trouble codes, then systematically inspecting each system. Never push through these problems on highways.
