the heater core is inside, behind the glove box. so if it were to leak, you would have coolant on the passenger floor. you must have a leak at engine or hose under the hood to get the smoke.
the air should come out each area you place it in. ie: defrost, floor, vents. hot or cold won't matter. the temp is controlled by the temp up/down control.
it sends none, or more & more air thru the heater core as the temp setting is raised.
if air comes out good in high fan when temp is on cold (like 65*), but not when setting is on 85*, then there is some thing blocking the air flow thru the heater core. dirt/lint?
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing.
TEMS, and some nice MODS. Sold to a friend 10/08/08.
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