What Causes the Engine to Shake with a 'Tut-Tut' Sound?
1 Answers
There are several reasons why a car engine may shake with a 'tut-tut' sound, including engine misfire, excessively rich fuel mixture, and cold starts. Here are the detailed explanations: 1. Engine Misfire: Engine misfire mainly refers to one or more cylinders not functioning properly. Common symptoms include intermittent exhaust flow, severe shaking of the exhaust pipe, and a clear 'tut-tut' or 'thud-thud' sound from the engine. This issue is often related to faults in the ignition coil. 2. Excessively Rich Fuel Mixture: When the engine's fuel mixture is too rich, symptoms include difficulty starting the engine, poor acceleration after starting, uneven engine operation, black smoke from the exhaust pipe, a 'tut-tut' sound from the engine, sometimes accompanied by backfiring, reduced engine power, and increased fuel consumption. This is mostly related to carbon buildup and clogged filters. 3. Cold Starts: During a cold start, the engine's lubrication is less effective due to poor oil flow and higher viscosity, leading to mechanical wear noises. Additionally, the coolant temperature is low during a cold start, and the fuel mixture is richer, resulting in incomplete combustion. This can cause the engine to shake and produce a 'tut-tut' sound, which is generally considered normal.
