I know that a lot of carb'd cars have a device that increases the throttle when the AC is switched on, but what about on a 2.5 TBI? Is there some type of circuit that ups the idle speed a bit when you hit the AC? On mine, the rpms seem to drop down enough at idle to slow down the blower motor and drop the ammeter gauge, but if you give it a little gas, the gauge goes up and the fan speed goes back to normal.
Also, vacuum reading with AC on goes from 18 down to about 15, but that might just be due to the rpm drop. I think the idle dropped down to about 600 rpms
Also, vacuum reading with AC on goes from 18 down to about 15, but that might just be due to the rpm drop. I think the idle dropped down to about 600 rpms