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I have a 2002 DF70 with 120 hours. The check engine light came on and the sequence was 3 - 1.
I replaced the IAC just to be safe but still had the same check engine code after installing the new part.
Next I plugged in the diagnostic tool and did the idle speed adjustment per the service manual. The check engine light is now off but the idle fluctuates between 625 and 780 rpms. This seems like too wide of a range. Is this something to be concerned about and if so, what adjustment should I do next?
I replaced the IAC just to be safe but still had the same check engine code after installing the new part.
Next I plugged in the diagnostic tool and did the idle speed adjustment per the service manual. The check engine light is now off but the idle fluctuates between 625 and 780 rpms. This seems like too wide of a range. Is this something to be concerned about and if so, what adjustment should I do next?