Thread: Desmog
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Old 12-15-2010, 03:41 PM
SteveH SteveH is offline
Hard Core 4+
Join Date: Aug 2006
Location: Colo Springs
Posts: 1,831

Hot Air Intake (HAI): Keeps intake air temperature hot even when it's cold outside. I haven't fully figure this out yet, I know that it's a thermally controlled valve on my air cleaner housing.

This prevents carburetor icing and speeds cold weather warmup. I highly recommend keeping it. If it's plumbed correctly, the flapper opens when the engine is hot to let cool air get to the engine.
Steve H. - KE0KNH
Colo Springs, CO
'78 FJ40, '89 FJ62, '98 4Runner
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