Knocks only in cylinder #3. Attached fpcal and data logs

FlashPro questions & answers specific to the 2006-2011 Americas Civic Si
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StrainChasin
Posts: 2
Joined: Wed Feb 28, 2018 12:31 pm

Knocks only in cylinder #3. Attached fpcal and data logs

Post by StrainChasin » Thu Dec 06, 2018 10:08 am

Tried reducing timing and adding fuel. Tried starting over. Tried stock basemap and tuned basemap same thing. Looked for loose stuff and no avail. I’ve looked through map for inconsistencies and only thing I can tell is it happens after string at light or etc. I can’t find it. Any help would be appreciated.

Kn intake
DNA headers to exhaust no cat etc to greddy muffler.
91 octane
Arizona
Pull spark plugs after 2 weeks and there burnt a little.
Flash pro manager tells me I’m rich but spark plugs say otherwise.
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Hondata
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Re: Knocks only in cylinder #3. Attached fpcal and data logs

Post by Hondata » Thu Dec 06, 2018 10:26 am

Probably the headers causing the knock reading. You need to tune the fuel as it is perhaps 7% rich. I think the wideband lambda is somewhat more accurate than reading plugs...
Hondata

StrainChasin
Posts: 2
Joined: Wed Feb 28, 2018 12:31 pm

Re: Knocks only in cylinder #3. Attached fpcal and data logs

Post by StrainChasin » Thu Dec 06, 2018 11:12 am

Will do. Have adjusted fuel and car felt really good but knock count didn’t change in cylinder 3. Did try to pull timing in cylinder trim #3. It then spread to #1 and sometimes #4. But will do and post catalog when I get home.

Diogo Oliveira
Posts: 30
Joined: Fri Aug 05, 2011 1:54 pm

Re: Knocks only in cylinder #3. Attached fpcal and data logs

Post by Diogo Oliveira » Wed Dec 12, 2018 3:45 pm

Try adjusting spark plugs gap. NGK comes with 1.1 gap from factory, but 0.8 works better (Denso spark plugs have 0.8 from factory if Im not wrong).

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