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Can anyone shed some light on why the Skyactiv engine is so loud when it starts up? After about 20 seconds of idling the engine then quiets down...

The salesman at the dealership told me that this is normal but I never thought to ask why...

Also, is it ok for the engine to start driving before the engine quiets down?
 

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This has been asked and answered here so many times......
Its part of the emissions process. On cold start the ECU advances the timing to raise the idle and adds extra fuel to get the cat up to operating temperature faster. Mazda says this reduces overall emissions from the car.
It probably won't hurt anything to drive the car but its only a few seconds. Use that time to put on your seat belt, check the other gauges, adjust your mirrors etc. I usually let the car idle for a bit, especially when its cold out, so the oil has a chance to warm up a bit and circulate properly.
 

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I know this topic has been asked several times. I came across this video a few weeks ago and thought it was appropriate to share.

Video is not mine, just thought I'd pass along the info :)

 
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