Thread: Pre ignition
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      09-27-2019, 02:17 AM   #20
SmokinJoe
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Quote:
Originally Posted by BeachM5nster View Post
can you try to explain what knock sounds like.. does knock happen 24/7? at idle? only when hot? etc..
im just trying to know more and understand better in the case i get this bc every video ive seen on f10 knocks, im not sure if it is actually knocking, bad vid quality, etc
The sound is not what some would call a knocking sound like a rod knock or anything like that. It’s pre ignition which sounds like a tin can with marbles in it being shaken. Only happens under heavy load when the boost is ramping in hard. Very few videos capture the sound of pre ignition also known as spark knock.
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