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running excessively lean can cause a misfire.
or a po300 aka random misfire.
if its lean enough it can go from being a random to a 301 302 303 04 05 06 07 08 based on what cylinder the crank sensor is seeing as a reoccurring misfire.
low voltage at a o2 sensor can indicate a lean condition.
generally speaking anytime a vehicle has misfire their is excessive oxygen present.
odds are it will throw a lean code along with misfire codes.
sometimes itll throw a o2 code in there too to screw with you.
so where the hell do you begin?
we need more data op.
not to mention all the aftermarket parts here dont help.
fwiw trims will rest during wot because of entering openloop.
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