on my '86 5kTQ, whenever i turn on the climate control (both heater or the a/c affects this) the rpm's kick way up, and only go back down to normal when i shut off the climate control. its more apparent when idling in neutral. normal rad. fan temp operation doesnt affect this, it just happens when i turn on the a/c or heater. any ideas? TIA, chris '86 5kT, TQ