Today is the hottest on record and when I started my car, which had stood in the sun for some hours, the engine idle was 1100 instead of 900 rpm.

When I restarted the engine after a short stop at the bank, idle had returned to a steady 900.

My question is whether the high idle speed is normal in those conditions? RRS (MY13) Santorini Black SDV6 HSE luxuary
Gone: Evoque, Freelander 2, Mercedes 320 CLK, Porsche 911's

Mine has done the same and I think it’’s the Air con. It was 36 C when it happened.

Just been out and started it and it’s idling at 1100.

yeah mine has been doing it.

it's for the air con

Mines the same and returns to normal when I turn the the ac off. 2019 5.0 SC SVA (Current)
2012 5.0 SC AB. Sadly written off by a campervan
23 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
1943 Whites M16 Halftrack (Current)
16 plate Eurofighter Typhoon, 2 x Eurojet engines with 20,000lbs thrust each. 1380mph

I’m a bit doubtful that the a/c accounted for it because I never turn the a/c off yet the idle returned to normal after restarting a hot engine.
I thought it might have had something to do with today’s extreme temperature. RRS (MY13) Santorini Black SDV6 HSE luxuary
Gone: Evoque, Freelander 2, Mercedes 320 CLK, Porsche 911's

My S/C seems to do that and fluctuates at times, just put it down to Air Con and ambient air temp high. Normal idle is less than 900 though, but being petrol may be different.

Cheers
Col

LG8340 wrote:

I’m a bit doubtful that the a/c accounted for it because I never turn the a/c off yet the idle returned to normal after restarting a hot engine.
I thought it might have had something to do with today’s extreme temperature.

to get the required pressure in the a/c system (due to high demand), it will increase idle