Here are the reasons why a three-cylinder plunger pump may lose pressure: 1. Aging of the car wash pump itself: Most booster pumps are plunger pumps, and if the rubber rings inside wear out, they need to be replaced with new ones. 2. Pipe blockage: Blockages in the pump's inlet or outlet pipes due to scale or debris can also cause insufficient pressure. Try replacing a section of the pipe. Below are the reasons for severe shaking in a three-cylinder engine: 1. Dirty air filter: Designed to protect the engine and reduce wear, the air filter is typically replaced every 10,000 kilometers. If not replaced in time, insufficient air intake can lead to low idle speed, causing engine shaking. 2. Spark plug lifespan: Spark plugs have a limited lifespan. After 30,000 to 40,000 kilometers, their ignition efficiency significantly decreases, which can affect ignition. 3. Low idle speed: The engine's idle speed is preset in the computer. When the RPM drops below a certain range, the car's computer will automatically adjust it. 3. Abnormal water temperature: The engine operates within a specific temperature range. High water temperature can cause early ignition timing, altered air-fuel mixture, thinning of engine oil viscosity, and reduced lubrication performance. Common causes of shaking include insufficient coolant, a stuck thermostat, a non-functioning fan, or inaccurate temperature control switch settings. 4. Clogged fuel injectors: The fuel injectors in electronic fuel injection vehicles are critical components for fuel delivery and have a long lifespan, often reaching hundreds of thousands of kilometers. However, gum deposits in gasoline can clog the injector nozzles, leading to inconsistent fuel delivery across cylinders and causing engine shaking.
