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Pulling plugs has never worked for me, am never sure that I can trust it.
Tried colour tune and still have the kit but was never sure that underload that thing were right.
Ended up getting a fueling dyno run done to satisfy my mind.
This is me, I over thing think things and want things and worry. Have holed pistons in the past as I missed things like bent throttle body spindles.
Might run lean..