Vectra Hunting When Warm

Hi to the group.
I have a friend at work who has an R plate Vectra 2.5 V6 petrol which hunts
when warm! He has no internet access so he asked me to help.

When he starts the car all is fine but as soon as the car starts to warm up
the engine hunts at idle. If he lets it run while in gear my friend
explained it like driving an older car with no throttle but with the manal
choke is pulled out.

The cam belt was replaced 8000 ish miles ago and he had a new ECU fitted 6
months ago. He has checked for any leads that might be loose and is a little
apprehencive about going to a garage because of the previous costs incured
( £590 for the cam belt ).

Any advice would be greatly appreciated.

tia

 

sounds like either the air idle valve or it may be getting air from
somewhere once its heated up causing the ecu to continually alter the idle
speed to suit.

 

idle control valve
easy to clean
there is a link if you wish oue

mike

 

Having similar problems myself from time to time, love to get the link
please.

All the best Vaughn

 

here as a couple for other engines but they are almost the same setup.

http://82.34.51.160/sytemsandsoftwa...automotive/How_to/General/ecotecidlevalve.htm
http://forum.vectra-sport.com/forumdisplay.php?s=6bd66aa0eef24fb95be42586aa00c1b3&f=20
http://thunderace.legend.co.uk/cgi-bin/advice/index.pl?read=4623

mike