What Causes Intermittent Loss of Engine Power?
2 Answers
It may be due to issues with the car's alternator, or problems with the fuel supply system and ignition system affecting performance. Engine power reduction can also be caused by carbon buildup in the engine. Carbon deposits in the engine can include various types, such as cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, and intake carbon deposits, all of which are factors that affect engine power. Here are the detailed explanations: 1. When there is excessive carbon buildup inside the engine, the car's ignition system may become misaligned, reducing the engine's intake efficiency and ultimately leading to a decrease in engine power. The car may exhibit symptoms such as weak idling, and in severe cases, it may even shake. 2. Fuel system failures can occur if the car is filled with low-quality gasoline, resulting in reduced engine power. If the car's fuel rating is 95, it must be filled with 95-grade gasoline, as this is the minimum fuel standard for the vehicle. Another possible cause is a blocked fuel tank vent, which restricts fuel supply, leading to an overly lean air-fuel mixture in the engine and reducing its efficiency. 3. Insufficient engine oil or insufficient engine coolant can increase the engine's load, impairing its cooling effect. This not only reduces engine power but also increases the car's fuel consumption.
With decades of experience in car repair, intermittent engine power loss is a common issue, mostly caused by unstable fuel supply. For instance, an aging fuel pump may deliver fuel inconsistently, causing power drops when accelerating. Ignition system failures are also frequent—worn spark plug gaps or cracked ignition coils worsen in rainy weather. A dirty mass airflow sensor sending incorrect data can mislead the ECU. Loose wiring connectors may cause intermittent power cuts, especially on bumpy roads. Don’t ignore these minor faults—promptly scan for trouble codes with a diagnostic tool. Delaying repairs risks engine damage or roadside breakdowns, posing safety hazards. Visit a professional shop for part inspections and replacements—it’s cost-effective and hassle-free.
