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13/02/2021 12:25 pm
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5.0L V8 coyote engine with 10k miles.
I’ve checked my fuel trim with a scanner a few times and long term fuel trim is always a high negative (around -10% or more).
It does this at idle and under load, both cold and fully warmed up. Is this normal?
Short term fuel trim stays around low negatives (0 to -2%). Exhaust always smells a little rich. I’m in Canada where the ambient temperature outside is around -2F. Should I be concerned with these values?
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13/02/2021 3:04 pm
If you are remotely concerned, take it to the dealer. It is a 2020. No need to work on it yourself.
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