What Causes Car Shaking When Accelerating Hard?
3 Answers
The reasons for car shaking when accelerating hard are: 1. Excessive spark plug electrode gap; 2. Faulty ignition coil; 3. Loose engine underguard screws; 4. Severe carbon buildup in engine, throttle valve, intake manifold, or valves; 5. Poor fuel quality. Solutions for car shaking when accelerating hard include: 1. Adjusting spark plug gap or replacing spark plugs; 2. Checking fuel pressure and cleaning fuel injectors; 3. Testing cylinder compression; 4. Cleaning throttle body, fuel filter, and fuel lines; 5. Engine maintenance and repair; 6. Inspecting coolant temperature sensor; 7. Replacing with appropriate engine oil.
I've been driving for almost thirty years and have encountered the issue of car shaking when suddenly stepping on the accelerator. It's usually related to minor problems in the ignition system, such as aging spark plugs—when the spark can't keep up, combustion becomes uneven, causing the car to shake. Additionally, carbon buildup in the throttle or clogged fuel injectors can lead to insufficient fuel supply, making the engine unstable during acceleration. Once, I was driving an older car on the highway and tried to overtake when it suddenly shook violently. Later, I found out it was due to aging high-voltage wires, and replacing them fixed the issue. I remind everyone to check these components during regular maintenance—it doesn’t cost much but can prevent major problems. A dirty air filter can also cause insufficient air intake, making the car 'struggle to breathe.' I recommend cleaning it every 5,000 kilometers for peace of mind and safety.
As a young car enthusiast, my modified car always shakes violently when accelerating. After some research, I learned it's mostly caused by fuel or electronic control issues - like clogged fuel injectors causing uneven fuel supply or delayed sensor signals leading to inaccurate engine computer control. Once after installing a new exhaust system and flooring the accelerator, my car shook wildly due to unstable fuel injection pressure, which improved significantly after cleaning. Poorly matched aftermarket parts like intake systems can also cause this by disrupting balance and affecting performance. My advice: don't just focus on the thrill - after modifications, visit a professional shop for ECU tuning to avoid engine damage. Also learn some DIY diagnostic skills, like identifying abnormal engine sounds and getting them checked by a mechanic.
