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Re: Tunning question
IDC is IDC regardless of what injectors are in the car.
The factory ECU will use the stock O2 sensor to shoot for 14.7:1 A/F during idle and cruise. If you lean it our or richen it up, the ECU will just override it and try to go back to 14.7:1, if everything is working correctly. Normally you try to get the fuel trims as close to 0 or 100(depending on how your logger reads) as possible, so that the ECU is having to compensate as little as possible.
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