Throttle heater Plate

[RDSPYDR]

What is the purpose of the throttle heater plate ? I am asking because I have never seen one until I owned a Fiat Spider ( F.I. ).

Thanks

[rlux4]

It pre warms the air which enhances combustion. I'm thinking this is one reason all the smog crap got eliminated except for the cat when they went to FI.
Ron

[So Cal Mark]

it's really more for driveability than emissions reduction. Take a look at any car with FI and they all route water through the throttle body.

[rlux4]

The fact that warm air is more efficient for combustion was my point. If you have more efficient combustion, a natural byprduct is less emissions.
Ron