Reasons for Car Body Shaking When Lightly Pressing the Accelerator
2 Answers
The reasons for car body shaking when lightly pressing the accelerator can be summarized into three points: 1. Fuel system issues: a. Most fuel system problems are caused by fuel line blockages, leading to poor fuel supply. Symptoms include engine shaking, unstable idling, and stalling while driving; b. Additionally, fuel pump malfunctions may also cause engine shaking. To diagnose fuel pump issues, disconnect the fuel line and check the flow rate and volume. 2. Electrical system issues: a. Check if the ignition timing is correct, as most ignition abnormalities are timing-related; b. Inspect whether the spark plugs have aged, if the gaps are consistent, and if there are any changes in the gaps; c. Furthermore, malfunctioning distributors may also cause engine shaking. 3. Mechanical reasons: a. Check the engine's operating condition for any abnormal sounds, such as valve noises; b. Inspect the belt's working condition for any looseness.
With over a decade of car repair experience, I've found that slight throttle-induced shaking is mostly caused by ignition system issues. Worn spark plugs or faulty ignition coils can lead to unstable combustion. Fuel system problems, like clogged fuel injectors or dirty fuel filters, can also cause poor fuel delivery. Loose transmission components, such as worn engine mounts, may induce vibrations as well. Carbon buildup is often overlooked – excessive deposits in the intake manifold can make throttle response sluggish. I recommend starting with spark plugs and air filter checks. Replacing spark plugs yourself isn't difficult, but if shaking persists, it's better to have a professional check the transmission and ECU settings. Don't underestimate this issue – prolonged neglect can damage the engine.
