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I have a question on my 2003 wrx my dyn adv mult is sitting at 15 I got told it should be at 16. N it sounds like my engine is knocking. Wondering what I could do too fix my subie.
 

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Check the misfire thread.

It could be a myriad of problems and just guessing is pointless
 

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The knocking sound often occurs when the air-fuel mixture is incorrect, which causes the fuel to burn in uneven pockets rather than uniform bursts. Left untreated, it can cause damage to the piston and cylinder wall. A knocking sound can also be caused by a lack of lubrication in the upper cylinder head area.
 
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