What Causes Weak Car Ignition?

[Leah]

Reasons for weak car ignition: 1. In winter, as temperatures drop, the viscosity of engine oil increases, making it harder to flow and thus increasing engine resistance. If starting is difficult, check if the wrong oil grade is being used; 2. After several years of use, spark plugs can develop issues like carbon buildup, leakage, excessive gap, or erosion, leading to difficult ignition, whether cold or even warm starts, often requiring multiple attempts; 3. In winter, most car starting difficulties are due to a weak battery or an expired battery lifespan. When the battery is low on charge, the engine cranks weakly during startup, producing only clicking sounds, which may turn into hissing sounds upon further ignition attempts.