Why does the car make a chugging sound when running?
2 Answers
Engine always chugging reasons are as follows: 1. Engine mount rubber aging or loosening: The engine mount rubber is the rubber block between the engine and the frame. 2. Improper oil usage: If the oil viscosity does not match the engine, it is easy to produce carbon deposits, causing the engine noise to increase. 3. Engine misfire: Engine misfire mainly refers to one or more cylinders of the engine not working properly. It is usually manifested as obvious intermittence in the exhaust gas flow from the car, severe shaking of the exhaust pipe, and a clear "chugging" or thumping sound from the engine.
My car has also experienced that puttering sound. Having driven for over a decade, I think it might be related to the engine ignition system. When spark plugs age or wear out, they can't properly ignite the fuel, causing cylinder misfires that sound like puttering. Sometimes it's a faulty ignition coil, or poor wire contact can cause similar issues. Additionally, if there's a leak or looseness in the exhaust system, uneven exhaust flow can produce similar sounds. Another possibility is clogged fuel injectors preventing proper fuel delivery, making the engine run unevenly. If not addressed promptly, the engine may vibrate more, increase fuel consumption, or even damage other components. It's best to visit a professional shop soon for a diagnostic scan to identify the specific cause, rather than waiting for a minor issue to become major.
