HELP sc 400 running rich no clue!!!!!!!!!!!!!!
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New to the forum new to lexus but love the 400. Extremely nice 400 no problems other than running rich....no codes.? Any clues? Revs slow and runs really really rich.
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Sounds like a MAF problem. If there is no code, I would check the boot to the throttle body for cracks. They get dry rotted and crack.... If that happens the car will run rich.