The engine start time becomes longer and the power is not enough: basically the problem with this sensor

Nowadays, automobile engines are all electronically controlled, with various sensors all over the engine. If a certain sensor has a problem, the engine will have to shake three times. I remember that I have encountered such a situation before: every time I start the engine, it is obvious that the time has become longer. It used to start in seconds, and now it has to wait at least two or three seconds for the engine to start. Moreover, the engine sound is not good after starting, and the power is still poor. Can't run overtaking, and can't run fast at high speed. Later, it was discovered that the camshaft position sensor plug was loose, plug it in again and everything is fine. Today I will share with you the malfunction performance of the camshaft position sensor. After the camshaft position sensor is broken, there will be slow start, high fuel consumption, and insufficient power. At the same time, the engine fault light will also light up.

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Camshaft is a device that controls the opening and closing of the intake and exhaust valves of each cylinder. There are protrusions with different positions on the camshaft, which are called cams. During the rotation of the camshaft, the cams sequentially control the opening and closing timing of the intake and exhaust valves of each cylinder according to a preset sequence.

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The camshaft position sensor tells the ECU each cylinder by judging the rotation angle of the camshaft The precise status. In this way, precise control of ignition timing and fuel injection timing is achieved.

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If there is no camshaft signal, the ECU will not be able to determine what state each cylinder is in. Only refer to the crankshaft position sensor to control ignition and fuel injection. However, the crankshaft position sensor can only determine the direction of piston movement, and cannot determine the specific state of each cylinder. For example, the pistons in the compression stroke and the exhaust stroke move upward, while the pistons in the power stroke and suction stroke move downward. As a result, when the engine starts, there are two pistons moving downwards, namely the intake stroke and the power stroke, but the oil is sprayed to the cylinder in the intake stroke, and the ECU does not know which cylinder is inhaling, so it will select one cylinder first. Try, if the cylinder with the intake stroke is selected, the engine can start normally. If the cylinder with the power stroke is selected, the engine cannot be started. At this time, the ECU knows that it is wrong, and then corrects it, so the engine start time is prolonged.

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In addition, the camshaft position sensor can also help the ECU to accurately control the ignition angle. The engine's power output and operating noise have an impact. Therefore, after the camshaft position sensor is broken, the ECU cannot accurately control the ignition angle, the power is reduced, and the noise becomes larger.

When this happens, the engine will enter a failure mode, which will limit the power output. Therefore, the engine start time is prolonged, the power drops, the vehicle speed cannot be raised, and the engine noise becomes larger.

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