Super knock

[Not_Jdm_Af]

Buddy of mine having these issues car is a 2020 pure 800 port inj 20k mikes fresh but trans put gas in it 69% e content and car went into limp no boost.. restart car and good again then it car wash at idle ca started misfiring and spuddering doesnt know what could be he just did titan plugs like 2k miles ago also has upgraded visconti valvecover any help would be appreciated

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[MisterSkiz]

" he just did titan plugs like 2k miles ago "

I'd start there

 

[Thraxbert]

Pull plugs, gap to 0.020. Use a gap feeler, not a crappy ring gauge.

 

[black_sedan]

when in doubt, part it out...

 

[D3ad_Hand]

Probably the spark plugs.

 

[XtremeMaC]

Bimmer forums results for Super-duper knocker
1) Fix: cat came loose and was blocking the downpipe.
2) Fix: ordered step 1 colder plugs and gapped to .022 (N55 engine)

fixed it yet?

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