Why does the Peugeot 408 experience jerking during acceleration?
2 Answers
The 307's engine is a high-revving engine, which delivers greater torque and power only at higher RPMs. Additionally, the 307's body is not lightweight. This shaking occurs due to insufficient torque, making it difficult for the engine to pull the car effectively. To address this, it's advisable to increase the shift RPM appropriately—shift gears at least above 2,500 RPM, preferably at 3,000 RPM, and maintain driving at around 2,500 RPM. Prolonged driving at low RPMs can lead to carbon buildup. Other factors contributing to insufficient torque include intake issues such as a dirty throttle body or air filter, as well as a weak battery. Here are some additional tips: 1. Occasionally drive at higher speeds: When driving with the AC on and the car fully loaded at low speeds, the RPM tends to drop, making this issue more noticeable. Safely driving at higher RPMs (not necessarily in higher gears) can help clear carbon deposits. 2. Refuel at reputable gas stations: If possible, upgrade to better spark plugs and higher-quality engine oil. 3. Clean the combustion chamber every 10,000 kilometers: Regularly replace or clean the air filter and use a fuel system cleaner every 10,000 kilometers.
My 408 has a jerking sensation during acceleration, possibly due to spark plug or ignition coil issues. Worn-out spark plugs can cause unstable ignition, leading to engine hesitation. Insufficient fuel pump pressure or clogged fuel injectors can also result in fuel supply interruption, making acceleration uneven. I tried checking if the air filter was clogged myself, and it improved after cleaning, but in severe cases, transmission fluid or clutch plates may need replacement. Regular maintenance, such as replacing spark plugs every 20,000 kilometers, can prevent this; otherwise, fuel consumption will increase, and driving becomes annoying. If the problem persists, visit a professional shop for ECU diagnosis to avoid minor issues turning into major repairs.
