I had a week or so where my fuel trims would go to -29%, car ran fine otherwise.
I pulled the MAF to clean it but it was spotless and bone dry... didn't do anything to it. i reinstalled the sensor and like magic my trims went back to +0-3%
Hasn't happened since.
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2013 FR-S 10 Series ~75k (SOLD)
RCE SS-1 Coilovers
Corsa Catback
Edelbrock Supercharger installed @ 50k
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