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Engine start-up jitter (start-up jitter?UEFA Champions League standings Please check the engine!) When we start the vehicle, if the engine shakes, it may mean that there is a malfunction. During the driving process, the engine is the "heart" of the vehicle. Especially in the start-up stage, whether the engine is running normally has a crucial impact on subsequent driving. Therefore, once the engine starts shaking, it needs to be checked in time to ensure the safety and stability of driving. First of all, let's understand the specific reasons for the engine start-up jitter. There may be many reasons for engine start-up jitter. The common reasons are as follows: 1. Fuel system problems: such as insufficient fuel pressure or fuel pump failure, which may cause engine start-up shaking. Two. Air intakeProblem: If there is a problem with the engine air intake system, such as blockage of the air intake duct, insufficient air flow, etc., it will cause jitter when the engine starts. 3. Ignition system problem: The ignition system plays a very important role in engine start-up, and the failure of the ignition system may cause engine start-up shaking. Four. Engine mechanical failure: If there is a problem with the engine valve or piston, it may cause engine start-up shaking. Next, we need to troubleshoot the fault to determine the specific cause. First of all, we can check whether there is any problem with the fuel system. Check whether the fuel pressure is normal, check whether there is a problem with the fuel pump, whether there is fuel leakage, etc. If there is a problem with the fuel system, repair or replace it in time. Secondly, we can check the air intake system of the engine.Check whether the intake duct is blocked and there are problems such as insufficient air flow. If there is a problem, clean up or replace it in time. Then, we need to check the ignition system. The ignition system includes three parts: ignition plug, high-voltage coil and ignition controller. We can check them one by one. Check whether there is any problem with the ignition plug, such as whether the electrode is corroded, whether the electrode spacing is correct, etc. Check whether the high-voltage coil is normal, such as corrosion, open circuit, short circuit and other phenomena. Finally, check whether the ignition controller is normal, such as whether there is a fault code, whether there is unstable voltage and other problems. If there is a problem, replace or repair it in time. Finally, we also need to check the mechanical parts of the engine, such as the valve, piston, etc. Check whether the valve has air leakage, poor sealing and other problems. Check whether the piston is worn, failed and other problems.If there is a problem with the mechanical part, it needs to be replaced or repaired. In a word, engine start-up jitter is a relatively complex problem, and its root causes may be diverse. Therefore, when troubleshooting, we need to check each part one by one, find out the specific reasons, and carry out maintenance and replacement in time. Through these measures, we can ensure that the engine does not jitter when starting, and ensure the safety and stability of the vehicle.

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