Quote:
Originally Posted by t vago
So, to be honest, I simply don't know.
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Sometimes admitting this is half the battle!
After thinking about it more, your ECU should adjust timing to compensate for hot IAT, eliminating the chance of pre-ignition....to a point. I would guess this to be 150F or so, allowing room above the highest imaginable ambient temps that the vehicle would ever see and heat soak when your vehicle is shut off hot and engine compartment heat gets to the IAT sensor.
I wonder if too hot will trigger a P1192 or P1193 code for IAT sensor out of range. I would suggest that if the check engine light comes on, be careful because the ECU may default to an incorrect IAT value and adjust timing accordingly, allowing the possibility of pre-ignition. However, your IAT will only ever get near coolant temp (~190F), and this is probably still in range.
Excuse my thinking out loud again.....