VVT can improve gas mileage by controlling the timing of the intake and exhaust valves, in addition to reducing emissions. When the valve timing is optimal, the nitrogen oxide (NOx) and hydrocarbon (HC) in exhaust gas are reduced, improving engine power, fuel economy, and performance. It is critical to have optimum valve timing in all engine operations in order to increase fuel economy, engine power, and engine performance.Īsian Variable Valve Timing It is an aftermarket replacement that meets or exceeds original equipment specifications in terms of fit, form, and function. Tier One automotive engine original equipment suppliers include Hitachi. In extremely demanding conditions, this product delivers the highest level of performance and durability. Products from Carquest meet a variety of domestic and import needs for premium engine management. The Carquest Premium engine management products are ideal for a wide range of domestic and foreign applications. We sell inventory at prices ranging from $127.19 to $267.31. Fortunately, changing the engine variable timing solenoid on a Nissan Altima is a relatively easy task that can be completed in about an hour.Īdvance Auto Parts has six trusted brands of engine Variable Timing Solenoids for the 2008 Nissan Altima. This solenoid helps to regulate the timing of the engine’s valves, and over time it can become dirty or damaged. In some car models, the VVT solenoid is located on the inside of the valve cover, which makes it more difficult to reach.If your Nissan Altima is starting to have trouble accelerating, or if you’ve noticed unusual vibrations when driving, it might be time to change the engine variable timing solenoid. Your car might be equipped with two VVT solenoids, and if this is the case, the second VVT solenoid will be on the exhaust camshaft. It is most often located at the intake side because the VVT solenoid is often only installed on the intake camshaft in most car models. The VVT solenoid is almost always located in the cylinder head near the camshafts. The engine control unit sends power and ground to the VVT solenoid when it is time to open the solenoid and adjust the camshaft timing. The VVT solenoid helps engines change their valve timing, ensuring that the performance is at its top without losing driveability on lower RPMs.Įlectronic principles of electromagnetism in the form of a solenoid valve control the oil flow to the camshafts. VVT Solenoid FunctionĪlmost all modern cars use VVT technology to improve their performance and fuel economy. Therefore, a faulty VVT solenoid can cause the performance to drop a lot if it does not advance the camshaft timing during acceleration. The VVT solenoid was innovated to increase the power on higher RPMs while keeping a steady engine performance at lower RPMs. So if you notice the smell of unburned fuel and a significant drop or increase in your average fuel consumption, it is very likely that your variable valve timing sensor is defective. VVT solenoid manages the valves’ opening and closing times to ensure that efficient fuel consumption is maintained.Īny malfunction of the VVT solenoid is therefore certain to result in efficient fuel consumption. If you have rough acceleration together with a check engine light on your dashboard, it could absolutely be due to a faulty VVT valve. If it fails, you may find it causing your acceleration to become rough, and it might even cause misfires when accelerating. The main purpose of the VVT solenoid is to adjust the camshaft timing so you will have effective and smooth engine operation at all different RPMs. If you notice strange idling problems with your car, it can be because of a faulty VVT solenoid. A very retarded camshaft timing will make it very difficult for the engine to not drop too low on RPM and stall. This is because the idling should be as smooth as possible. The VVT solenoid adjusts the camshaft timing when your car is running at idle. If one of the current situations is not compatible with the predefined values, the check engine light comes on.Īs a result, when the VVT solenoid is not working properly, the check engine light will come on your dashboard. Your ECU monitors and reports any activity going on in your car. With the help of the Electronic Control Unit (ECU), with which modern vehicles are equipped, you can notice any unusual activity going on in your vehicle via the check engine light. Here is a more detailed list of the signs of a bad or failing oil control valve to look out for: 1. You may also notice issues with the performance, like rough idle, rough acceleration, increased fuel consumption, or low engine power. The most common symptom of a bad VVT solenoid or oil control valve is a check engine light on your dashboard. Conclusion Symptoms Of A Bad Oil Control Valve (VVT Solenoid)
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