Tag: Engine, Variable, Valve, Timing, VVT, Mobile Mechanic, Car Repair Kenya

Variable valve timing (VVT) helps to provide smoother idling, better power delivery for everyday needs, improved fuel economy, and superior emissions control. In order to achieve all of these tasks, your VVT system requires a number of different components including the variable valve timing solenoid. The VVT solenoid is responsible for changing the position of the camshafts in the engine. It works on oil pressure, and can either advance or retard cam position to provide the right performance from the engine. Each camshaft is equipped with a VVT solenoid, which is capable of altering the supply of oil pressure to the camshaft depending on the speed and load of the engine. If the VVT solenoid is not working properly, the Check Engine light will come on and your engine will perform noticeably worse.

The most common cause for VVT solenoid problems is dirty oil, which clogs the screen that sits between the solenoid and the VVT pressure switch. | If the solenoid doesn’t operate, the VVT system will remain disengaged, which can adversely impact engine performance, fuel economy and more.

The faulty variable valve timing actuator (VVT) solenoid is located and identified | The variable valve timing actuator (VVT) solenoid is removed | The new variable valve timing actuator (VVT) solenoid is installed | The engine is tested with a scanner for proper variable valve timing actuator (VVT) solenoid | operation The vehicle is road tested and checked for proper variable valve timing actuator (VVT) sensor operation

Because the solenoid is located at the camshaft (near the VVT switch), it cannot be inspected on a regular basis. The only time it will be inspected is if you are experiencing problems with the VVT system, or the Check Engine light illuminates and the computer provides a camshaft position or VVT system related code. If you do experience variable valve timing issues, have one of our expert mechanics diagnose and repair the issue.

If your vehicle is equipped with a variable valve timing system, it needs to operate as designed for proper performance and fuel efficiency. If your vehicle’s VVT solenoid is faulty, have it replaced as soon as possible to regain your lost performance.

Variable valve timing systems have been around since the 1960s in one form or another, but they didn’t start seeing widespread use until the 1990s, when the DOHC system became prominent. They’ve advanced a lot since then, and today, most automakers have their own proprietary variable valve timing system. The variable valve timing switch is a pressure switch, and is designed to be open on a normal basis. It’s located at the VVT solenoid inside the engine and is responsible for telling the car’s computer if oil pressure was delivered to the VVT system. After pressure has been delivered, the switch closes, creating a voltage drop to 0. The car’s computer interprets this as a positive signal of oil pressure delivery. If the variable valve timing switch fails or reads incorrectly, it can cause the engine to run rough and fuel economy will be affected. The Check Engine light will come on with variable valve timing codes.

If the VVT switch fails, the Check Engine light will illuminate with a fault code. | The VVT switch is an electronic component, and can fail due to exposure to high heat and poor engine maintenance practices such as irregular oil changes.

The faulty variable valve timing actuator (VVT) switch is located and identified | The variable valve timing actuator (VVT) switch is removed | The new variable valve timing actuator (VVT) switch is installed | The engine is tested with a scanner for proper variable valve timing actuator (VVT) switch | operation The vehicle is road tested and checked for proper variable valve timing actuator (VVT) switch operation

The variable valve timing switch is an internal part, and cannot be checked visually. Aside from regular maintenance during the process of oil changes, there are no preventative measures you can take against VVT switch failure. If your car’s Check Engine light is on and associated VVT symptoms are present, have one of our expert mechanics diagnose and repair the problem.

With a faulty variable valve timing pressure switch, your VVT system cannot operate correctly or may not operate at all. This will have a significant impact on overall engine performance, and can lead to serious damage. We recommend having your engine inspected immediately for any suspected VVT switch related problems and repaired as soon as possible.