Higher RPM when airco pump kicks in

[Nico LS400 1995]

Hi people

Is there a way to stop my LS400 1995 from increasing the RPM when the airco pump kicks in?

[steve2006]

Hello and welcome to the LOC.

In a word no..due to the extra load on the engine for the AC the increase in engine idle speed is normal or the engine could stall.

Why do you want to stop this feature as it only affects the idle speed, if you are driving it makes little difference anyway, I leave my AC on all the time. With a 4 litre engine it makes little difference to fuel economy anyway.

[Texas]

+1 on above, it's normal for this to happen and not a problem, the extra load on the engine gotta be provided somehow! My mondeo revs increase at idle if I put the electrically heated windscreen on!!!

paul m.