I am the third owner of a 2000 Astra G which has never pulled well on part throttle in the 21/2 years I have had it and judders on a small throttle opening when cold. It has had a new coil pack and plugs and I now suspect the EGR valve.
A service receptionist at a local Vauxhall dealer has advised that an ECU software upgrade is necessary/advisable when replacing the EGR valve (or does this only apply if blanking off?). Is this a load of waffle or would it be a good idea to get an official dealer to check for upgrades as it has only been serviced by independent garages for many years?
Thanks in advance for your advice.