Hey Scotty, wonder what u think of short term 2-3% -+, long term +18-19% trim, n adv timing +8-9%, background its 100k 2.2l ecotec, pretty good 26-27mpg, no real issues, had map, throttle cleaned few yrs ago n fuel filter replaced, had check engine light for lean condition in for while due to left rear fuel line leak but fixed, no codes recently but light was on n now cleared, really tuns kukr champ....any 1st impressions etc...? Could use 50+yrs of expertise...thx!
Where are the short-term? Trim is fine but the long-term trim is way off. But those things have kind of squirrely systems with that ecotec so I would take out all four spark plugs and look at. And if they're not burning real white showing that they're super lean but they look sort of normal. I just live with it. The ego text systems are kind of squirrely as they age
U know, had #1 o2 sensor replaced yrs ago but not #2...maybe lazy sensor...also, car got 160k, w engine only 100k, swapped due 2 bad timing chain etc...