Resistor connectors are under each coil . They connect the coil to the plug [ there are 3 of them] They are routinely changed when channging plugs due to their high fail rate and low cost..
The IAT sensor is in the cross pipe , between the MAF and the intake.
If it is open, disconnected , etc, that is your problem..
If not , post findings and I will give you the temp/resistance chart for checking the values for spec.