Why does the car feel like it's cutting fuel when accelerating by stepping on the gas pedal?
2 Answers
When the car accelerates, the feeling of fuel cutting can be caused by engine carbon deposits or fuel system malfunctions. Below is a detailed explanation: Engine carbon deposits: Carbon deposits include cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, and intake carbon deposits. These areas are closely related to the engine's power output. When there is excessive carbon buildup inside the engine, the car's ignition energy decreases, and intake efficiency drops, ultimately leading to reduced engine power and symptoms like shaking and weak acceleration. Fuel system malfunction: Using an incompatible fuel grade can cause a decrease in the car's output power and reduced performance. Alternatively, if the fuel tank vent hole is blocked, it may not meet the required fuel supply, resulting in a lean air-fuel mixture and weak engine acceleration.
I also experienced a fuel-cut sensation when accelerating in my old car, like it was gasping for breath—mostly fuel system issues. A clogged fuel filter traps debris that blocks fuel flow, causing jerky acceleration due to insufficient fuel supply. Or an aging fuel pump with unstable output. Another culprit is heavily carbon-fouled injectors disrupting smooth fuel spray, leading to intermittent acceleration. A dirty air filter restricting airflow can also leave the engine sluggish. Don’t overlook the ignition system—worn spark plugs causing erratic firing often trigger this too. Regular maintenance is key: change oil/filters and inspect air filters routinely for cost-effective safety. If unsure, have a mechanic run a diagnostic scan immediately.
