Losing power

[Dan jones]

Could any one help I have a2009 sri estate it's now losing power if i stop and restart engine it's ok for a bit then does it again has anyone got idea what it could be

[Vauxhall Owners Club]

Hi.....welcome to the Forum

If it has a turbocharged engine then sometimes the variable vanes become gummed up with carbon through lack of revs to keep everything clean and moving.
You can buy a cleaner to run through the turbo to clean it up and a good blast helps to shift the carbon.

Also, it could be an Air Mass Meter (MAF sensor) fault which is causing the loss of power.
https://autoevoke.com/index.php?/news/forums/guide-to-maf-sensors-r134/

A scan of the fault code memory should reveal some more information as to what is going on