How to Determine Excessive Engine Carbon Deposits?

[RyderDella]

Methods to determine excessive engine carbon deposits are: 1. Observe if the car experiences shaking; 2. Monitor if fuel consumption increases; 3. Check if the vehicle's power decreases. Ways to clean engine carbon deposits include: 1. Adding fuel additives when refueling; 2. Disassembling and cleaning the engine; 3. Performing an intravenous drip cleaning for the car. Causes of car carbon deposit formation are: 1. Long-term poor driving habits of the owner; 2. Mismatch between fuel grade and compression ratio; 3. Aging or damage of the engine carburetor; 4. Prolonged high-load driving; 5. Not replacing the air filter; 6. Inaccurate ignition timing or fuel supply timing; 7. Low engine temperature; 8. Poor sealing of valves and valve seats; 9. Prolonged engine idling.

[JamesonMarie]

I remember there was a period when the car was particularly difficult to start. During cold starts in the morning, the engine always seemed to struggle, and the idle speed fluctuated up and down, unstable as if dancing. Acceleration was noticeably sluggish, with delayed response when pressing the throttle, making overtaking a challenge. Additionally, fuel consumption increased significantly—previously, a full tank could last 500 kilometers, but now it barely reaches 400. There was also a pungent, unusual smell from the exhaust. These symptoms typically point to carbon buildup, which clogs the intake valves and pistons, affecting airflow and combustion efficiency. To confirm, you can listen for any abnormal noises while the engine is running or visit a repair shop for a professional inspection. Addressing the issue promptly can prevent worse problems, such as engine overheating or damage.

[MacMaddox]

After driving for a long time, I've become very sensitive to changes in the engine. With excessive carbon deposits, the acceleration feels weak, and the throttle response is sluggish, as if something is holding it back. The engine shakes noticeably at idle, and you can even feel the steering wheel wobbling while sitting inside. A sudden spike in fuel consumption is also a warning sign. I've measured it several times - it used to be 9L/100km in city driving, but now it's nearly 11L. The exhaust might even emit black smoke with a foul odor. All these symptoms stem from carbon deposits hindering complete fuel combustion. A simple test is to use carbon cleaner and drive on the highway to see if symptoms improve. If not, it's time for a disassembly inspection.

[Derek]

I feel the car has become weaker in power during normal driving, occasionally has difficulty starting, and often experiences rough and unstable idling. Fuel consumption has noticeably increased, with a full tank running dozens of kilometers less than before. Carbon buildup can obstruct the air intake, affecting the air-fuel mixture ratio. When inspecting, pay attention to the exhaust tailpipe—if there's heavy black residue or unusual odors, it's likely due to carbon buildup. Don't delay; address it promptly to protect the engine.