[Cytoplasm0671]

Originally Posted by Cytoplasm0671

Tune: BM3 OTS Stage 1 E30 map
Mix: E38 using 93-octane Shell gas (see log flexfuel sensor)
Equipment: Active Autowerke downpipe, TU HPFP, Pennzoil Plat Euro 5w40 oil, new NGK plugs (stock gapped)

Have had engine knock at low-RPM in the past. On advice of this forum am running E38 on the E30 tune to try and clear up the knock.

2 logs still have engine knock

Log 1: https://www.bootmod3.net/log?id=662f...7ee711b7e3d41b

Log 2 (knock): https://www.bootmod3.net/log?id=662f...7ee711b7e3d47a

Log 3 (knock): https://www.bootmod3.net/log?id=662f...a8bf21c558e861

Log 4: https://www.bootmod3.net/log?id=662f...a8bf21c558e869

Any ideas what to try next?

**EDIT**

I think it might be something on cylinder 5. For both knock logs, it seems cylinder 5 that is knocking. Also see this E30 Stage 1 Map w/E43 from September: https://www.bootmod3.net/log?id=6502...90c6120936bbcd this Stage 2 map: https://www.bootmod3.net/log?id=6502...0b435ca6e0a8cc and this Stage 2+ map: https://www.bootmod3.net/log?id=6502...729b152462c3f5

It is always cylinder 5 that is most affected. Already replaced plugs so it might be time for some new coils or injectors? Anyone have any thoughts?

Any thoughts? Does cylinder 5 also look like the leading problem to others? Should I replace the coils and see if that helps?