Revs dropping when steering wheel turned when idling

S-Type
1

My early 2000 S-type 3.0 Automatic idles fine but I’ve noticed when turning the steering wheel when in Park and idling the revs drop down as the steering wheel is turned - is this normal? I’ve never come across this with any other cars.

When I first start the car, the revs are at over 1000rpm for a while then it drops down to below 1000rpm and idles fine until I turn the steering wheel.

Greatly appreciate any advice

2

That is normal for all cars, especially if you go to full lock. If the engine keeps idling it can take the load and so it’s fine. A higher cold idle shows the idle valve seems to work.