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Run the codes.
The IAC is absolutely nothing like the MAF sensor. The MAF measures the amount of air going into the engine and with the O2 sensor the computer changes the amount of the the injector is open.
The IAC is a solenoid valve only used for idle speed, nothing else. When the throttle is closed, and the engine reaches a low enough RPM, the computer will open the valve just enough to keep the engine at a steady RPM.
For these engine, the MAP sensor is most like a MAF sensor.
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