high revs on cold start

fiish · 4th April 2008, 03:04

When cold starting my 51 plate 2.5 v6 the engine starts without a problem but idles just under 2000 revs. When the engines warms up the idle speed is normal. This is a problem that has just started so i know this is not normal, hope somebody can give me a few pointers.

Vulcan69 · 5th April 2008, 23:34

I have a '02 plate V6 that does this occasionally so I'd be quite interested in any expert opinion on this as well! I thought it was associated with my dodgy throttle body mechanism but had the whole thing replaced and I still get a 'lively' start now and again. Normal behavior for a V6?? A workmate thought that automatic chokes can cause this whilst someone else muttered something about engine temperature sensors!!

Over to the experts....

4th April 2008, 03:04	#1
fiish Newbie 2.5 CONN SE TOURER Join Date: Nov 2007 Location: Aylesford Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	high revs on cold start When cold starting my 51 plate 2.5 v6 the engine starts without a problem but idles just under 2000 revs. When the engines warms up the idle speed is normal. This is a problem that has just started so i know this is not normal, hope somebody can give me a few pointers.

5th April 2008, 23:34	#2
Vulcan69 Regular poster Rover 75 Tourer 2.5 SE Join Date: Feb 2007 Location: The frozen North Posts: 77 Thanks: 0 Thanked 0 Times in 0 Posts	I have a '02 plate V6 that does this occasionally so I'd be quite interested in any expert opinion on this as well! I thought it was associated with my dodgy throttle body mechanism but had the whole thing replaced and I still get a 'lively' start now and again. Normal behavior for a V6?? A workmate thought that automatic chokes can cause this whilst someone else muttered something about engine temperature sensors!! Over to the experts....