What are the effects of a faulty engine check valve?

[VanVictoria]

The impact of a damaged exhaust gas recirculation (EGR) valve is the inability to control the amount of recirculated exhaust gas. Excessive exhaust gas participating in recirculation will affect the ignition and performance of the air-fuel mixture, thereby impacting the engine's power output, especially during idle, low-speed, light-load, and cold-start conditions, where recirculated exhaust gas can significantly impair engine performance. The function of the car's EGR valve: It allows a small portion of exhaust gas to re-enter the cylinder for combustion. This small amount of exhaust gas lowers the combustion temperature in the cylinder. Since NOx is generated under high-temperature and oxygen-rich conditions, this process inhibits NOx formation, thereby reducing NOx emissions. Causes of EGR valve failure: 1. Quality issues with the EGR valve itself. 2. Improper maintenance. 3. Poor fuel quality. 4. Aging, as the EGR valve operates under high engine temperatures and, like valve cover gaskets and rubber seals, is prone to aging.

[SanMaddox]

Last time the one-way valve in my car's engine failed, I could feel the engine wasn't running right. At idle, it shook violently, like an unsteady heartbeat. Fuel consumption shot up - where a full tank used to get me over 600 kilometers, now it barely reaches 400, which really hurts the wallet. The most annoying part was the difficulty starting, especially on cold winter mornings, requiring multiple attempts before it would turn over. The exhaust smelled off too, with a burnt odor, probably from oil being sucked into the combustion chamber. I also noticed abnormal oil consumption, and upon inspecting the undercarriage found oil stains, which made me realize the one-way valve was the culprit. If left unrepaired, long-term effects would include worsening carbon buildup in the engine, potential piston ring damage, and even excessive exhaust emissions impacting the environment. My advice is to get it checked and replaced at a repair shop sooner rather than later - don't wait until major problems develop like I did, ending up spending much more.

[DeJayce]

I experienced a one-way valve failure that caused quite a few headaches in my daily driving. When the engine light came on, it gave me a real scare. Then I noticed the power had become sluggish - accelerating during overtaking felt like an old ox pulling a broken cart. Fuel consumption increased by nearly 20% compared to normal, adding hundreds to my monthly gas bills - definitely not cost-effective. The unstable idle was particularly annoying; the car would shake inexplicably at red lights, prompting passengers to ask if it was an earthquake. The mechanic later explained that a faulty one-way valve allows exhaust gases to flow back into the crankcase, contaminating and accelerating oil degradation. It can also cause oil leaks - my car's undercarriage was seeping oil, leaving stains in the garage. Most critically, this hidden danger affects engine lifespan; if left unaddressed, it may lead to cooling system failures or cylinder overheating. Fortunately, valve replacement isn't expensive and can be a DIY job, but it's better to have professionals handle it to prevent incorrect installation.

[AddysonDella]

A faulty check valve can cause significant issues. The primary problem is a rapid increase in fuel consumption and reduced engine efficiency. Idling becomes very unstable, making the car shake uncomfortably. Additionally, it leads to increased carbon buildup inside the engine, contaminating the engine oil and causing lubrication failure, which may damage other components like the pistons. Long-term neglect can result in abnormal exhaust emissions, failing to meet environmental standards and polluting the environment. I must remind everyone to inspect and repair it early.