What are the symptoms when starting a car with cylinder scoring?
2 Answers
Starting a car with cylinder scoring will exhibit the following symptoms: 1. Significant decrease in engine power, resulting in poor vehicle acceleration. 2. Engine overheating, triggering the coolant temperature warning light, and may even experience boiling over. 3. The engine malfunction indicator light comes on, accompanied by blue smoke from the exhaust pipe. 4. Additional information: Generally, a car with cylinder scoring won't start. If it does start, it might indicate minor scoring or scoring in just one cylinder. If the engine starts despite cylinder scoring, it will experience shaking, trigger the malfunction indicator light, emit blue or black smoke from the exhaust, and show a noticeable drop in power.
I once drove an old car that had cylinder scoring, and the startup was simply horrifying. After pressing the ignition button, the engine first made a choking sound, as if something was stuck inside, and it wouldn’t start at all. After barely managing to start it a few times, I could hear the pistons squeaking against the cylinder walls, like metal scraping against something, shaking the entire car before it stalled. Later, faint blue smoke emerged, accompanied by a burning smell. This reaction indicates severe internal engine wear. If you force it to start repeatedly, you might completely ruin the engine components. It’s recommended that the owner shuts off the engine immediately upon noticing any abnormality, avoids further attempts to start it, and arranges for a tow to a repair shop for a full inspection—otherwise, the car could break down at any moment on the road, leading to serious trouble.
