I remember a post about this but I can tfind it so here goes again. When I have my A/C on and I change gears my RPM's seem to stay up and not drop at all when the A/C is on. If the A/C is off it is normal. It wasnt doing it as bad today but it was doing it alot yesterday.

Dave
05 Ford F150 SuperCrew FX4

I also noticed this, too, but never really thought about. I wonder if it has something to do with manifold pressure or vacuum; with the A/C on, the vacuum will read 1-2 in Hg less than normal.

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Kon C

"Sometimes, a man has to do what a man has to do."