Thread
:
20 second stumble on cold start 2018 STi
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01-04-2019, 06:50 PM
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greygonzalez
Scooby Newbie
Member#:
461647
Join Date:
Jan 2017
Location:
Trinity, FL
Vehicle:
209 STI
ISM
I have the same issue. It’s when the rear 02 sensor turns on and the fueling trims go nuts. It only takes a few seconds for it to properly adjust.
At the moment there is no fix from what I believe. I worked with a few tuners who told me this.
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