Q
why is my engine running cold
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
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The Check Engine Light (also known as the Malfunction Indicator Lamp) is a signal from the car's engine computer that something is wrong. It can come on for various reasons such as a malfunctioning sensor, a problem with the exhaust system, a misfiring engine, problems in fuel efficiency, a loose gas cap, or even due to failure in the car’s electronic systems or mechanical components.
To understand the exact issue, the car should be diagnosed using a professional scan tool that can read the specific error code stored in the car's computer, and then necessary steps should be taken to fix the problem. Until then, the light will continue to illuminate as a warning sign.
Engine braking, also known as compression release braking, is a method of braking used particularly in motor vehicles with large diesel engines. It uses the engine to assist in slowing the vehicle down, rather than relying solely on mechanical brakes.
Here's how engine brake works:
1. Engine brake is activated when the driver takes their foot off the accelerator. This causes the vehicle's speed control valve (throttle) to close.
2. With the speed control valve closed, air is blocked from the coming into the cylinder of the engine from the intake manifold.
3. During the cylinder’s piston upward movement (compression stroke), the already trapped air is compressed but with nowhere to go since the throttle is closed.
4. When the compressed air has nowhere to go, it pushes back on the piston again. The force required to push the piston back down on the power stroke slows the engine's crankshaft, reducing the rotation speed of the vehicle's drive wheels.
5. This process of air compression creates resistance, or drag, which slows the vehicle down.
6. The ignition system doesn't ignite fuel in the cylinders during engine braking, so it's a way to convert the vehicle’s kinetic energy back into heat generated by compression.
7. Lastly, when the driver puts their foot back on the accelerator, the speed control valve reopens, air flows back into the cylinder, and the engine returns to powering the vehicle forward.
It's important to note that using engine braking isn't recommended in all driving situations, but can be beneficial in prolonging the life of mechanical braking systems, especially when hauling heavy loads or descending steep slopes. Some vehicles are equipped with a separate system known as an exhaust or Jake brake, which uses engine braking to a greater extent.
The appropriate air pressure for your tires depends on the specific vehicle and tire types. Generally, passenger cars' tire pressures range from 32 to 35 psi (pounds per square inch) when cold. You should check your vehicle's owner's manual or the placard on the driver's side door frame for the manufacturer's recommended tire pressure. This recommendation is designed to ensure optimal grip, fuel efficiency, and tire lifespan. It's essential to measure tire pressure when the tires are cold (i.e., the vehicle has not been driven for at least three hours) for an accurate reading. Over- or under-inflating your tires can lead to uneven wear, reduced fuel efficiency, and can impact the vehicle's handling, possibly leading to increased risk of accidents. Keeping your tires inflated to the recommended pressure is an easy yet crucial aspect of vehicle maintenance.
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