What Are the Effects of Excessive Carbon Deposits in Cars?

2 Answers
EverettLynn
07/25/25 3:18am
The effects of excessive carbon deposits in cars include: 1. A decrease in the pressure within the engine cylinders, causing the vehicle to shake when idling. Due to interruptions when the air-fuel mixture enters the combustion chamber, the engine's efficiency is reduced; 2. Affecting the ignition quality of the spark plugs, and may even lead to failure to ignite; 3. The oxygen sensor cannot accurately detect the condition of the exhaust gases, leading to excessive engine emissions and the release of more toxic gases such as PM2.5. Carbon deposits are residues formed from the incomplete combustion of unsaturated olefins and gums in lubricating oil and fuel under high temperatures during engine operation. These residues accumulate in various parts of the system instead of being expelled with the exhaust gases, forming a black, coked substance.
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StAxel
08/10/25 4:56pm
Excessive carbon buildup makes driving really uncomfortable. The car feels sluggish, with delayed throttle response that makes overtaking nerve-wracking. The worst part is the engine gasping for breath during cold starts - several winter mornings it nearly failed to start. The steering wheel vibrates at idle like a massage chair, and the whole body shakes at red lights. Fuel consumption keeps climbing too - last year a full tank could cover 550km, now the warning light comes on at 480km. The exhaust smells terrible too, almost failing the annual inspection. I recommend getting a carbon cleaning every 20,000km and taking more highway trips - never let the engine suffer internal damage.
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