Possibly due to a slight increase in idle speed when the air is on and due to the fact that the cooling fans are two speed, with the higher speed running when the ac is on.


Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black