FiTech EFI system

matthon said

I'm guessing here, but I don't see a reason for a high idle as long as the AFR is managed based on the temp.

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I believe the OEs do it for getting the engine and catalyst up to proper temp quicker and able to go into closed loop. My FITech idles up slightly maybe 100-200 over target when first started. Once in gear it maintains the AFRs and idles normally.