I guess ill be orfering ngk iridiums one step colder from modern on monday. are there any side effects to running a step colder plug?
and yes i do have a wideband. my afr is 11.6 at about 3500 then 11.4 til 5k to where it drops to 10.8 by redline. i thought leaving it rich like that would help with knock...guess i was wrong lol.
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