Larry, are you saying the evap is just a few more steps past his pictorial? My driver side vent lately has been pumping out hot air when I nail the gas to pass a semi. As soon as I return to cruising speed or idle, it blows cold dry air again. Only seems to do this when A/C demand is "marginal" i.e. around 60 to 75 degrees when the HVAC unit has to "blend" or decide between hot, cold, or A/C air. When it's 80 or above, requiring that the HVAC unit keep A/C on continuously, I don't experience this phenomenon. Same thing when it's cold outside - everything works normally. So I suspect the dash pods, since nailing the gas will cause a sudden vacuum drop. I can live with it in this state by just closing the driver side vent when this occurs, since A/C air still blows out the center vents fine. But I'm thinking if the problem gets worse I might have to pull the dash to replace some pods. I figure that if I'm in there already I might want to at least inspect the evap. Any suggestions?

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