What are the symptoms of a faulty exhaust valve in a vehicle?
3 Answers
A damaged exhaust valve can cause engine shaking or even stalling during idle. Relevant information about the exhaust valve is as follows: 1. Symptoms of damage: When the exhaust valve is faulty, it cannot control the amount of exhaust gas recirculation. Excessive exhaust gas participating in recirculation will affect the mixture concentration, leading to difficulties in starting, engine shaking, unstable idle, weak acceleration, and other phenomena that impact engine performance. 2. Function: The exhaust valve serves as an oil-gas separator. When functioning properly, it only draws in exhaust gas, not oil. If the exhaust valve is damaged, it loses its oil-gas separation capability, potentially sucking in oil along with the gas, allowing oil to enter the combustion chamber, resulting in oil burning and blue smoke emissions.
I just encountered an exhaust valve failure. The engine idle was unstable, and the car body shook like a sieve. When accelerating, the throttle felt weak with no power at all, and climbing hills was even more difficult. The engine warning light on the dashboard was on, which was really annoying. Checking the fuel consumption, it was indeed much higher than usual, costing me extra money every month. The exhaust also emitted black smoke with a foul odor, not only polluting the environment but also making me worry about being stopped by the police on the road. The mechanic said that a stuck valve could cause the computer to misjudge the fuel injection, leading to higher fuel consumption. After replacing it promptly, everything returned to normal. I suggest everyone regularly check the emission system and not wait until the problem becomes severe.
Attention car enthusiasts, when the exhaust valve has issues, the vehicle's reaction is quite noticeable. After starting, the idle speed becomes unstable, and when driving, the power weakens, making it difficult to overtake. The malfunction indicator light will definitely come on, alerting you to a problem. Fuel consumption rises rapidly; my car's full tank doesn't last more than a few days before it's almost empty. In terms of emissions, the exhaust emits heavy smoke with a strong odor, which is bad for the environment. If left unrepaired, the catalytic converter may also fail in the long run, and that will be more expensive to fix. Regular maintenance can prevent these troubles; just take it to the 4S shop for a check-up and it'll be sorted out.
