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Old 7th December 2023, 09:28   #15
SteveThackery
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Rover 75 Connoisseur SE saloon, 2.5 KV6 automatic, 2002, White Gold

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Quote:
Originally Posted by OddSox View Post
Quick update.

Something that is puzzling me is how do you adjust Idle speed on these modern engines?

When cold the engine idles absolutely fine at about 1200 RPM. It didn't idle this smooth until i replaced the outside temperature sensor though.

This is what is getting to me about this.

When the engine is up to temperature it is Idling at around 700 RPM....Which i think is too low.
You can't adjust the idle speed - the ECU looks after it for you by controlling the idle air valve near the throttle body. There is no screw. But why would you want to change it? The ECU knows better than we humans when it comes to things like idle speed and mixture.

I've got the 2.5 KV6, and mine shows 650-700 rpm on the tacho, as best as I can eyeball it. The idle is smooth. Is yours misfiring down at that speed?
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Last edited by SteveThackery; 7th December 2023 at 09:30..
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