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One thing I've noticed, is that my car is hot idling for a long time (inbetween autocross runs for a heat if I don't shut the car down between runs), my idle fuel trims climb easily into the +teens. After I leave the event and get some normal running on the car the fuel trims reduce back to where they normally are (<5). Seems that extended idling/chirping is doing something that is causing the injectors to have to increase duty cycle to meet AFR's.
Anyone else notice this?
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