The engine in my 2000 Daihatsu Sirion has recently become noisy and started shaking. A mechanic said nothing wrong with it and 3-cylinder cars are like that, so what do you think? Where are the spark plugs located if I was to replace them?
What the mechanic told you is rubbish, there has clearly been a change in the way the engine is running, and that suggests there’s a problem. Changing the spark plugs, they’re located in the cylinder head, and the spark leads is a good idea. If you’re not sure take the car to an auto store and they will show you the plugs and leads and supply you with replacements.
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