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very lumpy when cold

Posted: Tue May 19, 2009 9:41 pm
by 406mad
hi i have a x reg 2.2 sri,and when i start it from cold it is very lumpy,and when i drive it for about 15 to 20 min it is fine,and i think it could be better on petrol as it is only doing around the 25mpg,any one got any ideas,please

Re: very lumpy when cold

Posted: Tue May 19, 2009 9:50 pm
by mjb
Try changing the coolant temperature sensor

Re: very lumpy when cold

Posted: Tue May 19, 2009 9:57 pm
by 406mad
would it be possible to tell me were i would find this,many thanks