Really sorry for the super late reply, I've been flat out busy.... but have some news on this problem. In short another vectra came in the shop almost a perfect match!! i thought bonus ill check the injector pattern on that car and got the exact same pattern.... that got my grey matter going and wel...

Thanks very much for the reply, I will be out of the workshop for the next couple of days but I will be sure to have a go on my return and post my findings. Thanks again for the help

Oh just to note yes this is a petrol GDI.

Thanks

Burfd

Good people of the forums I'm in need of help please. I have a vectra-c 2.2 petrol z22yh engine and i have a eml on for P0304 cylinder 4 misfire. prior to coming to me its had new plugs, coil pack and injector's although I'm told the injectors were second hand off a known god car.. now i have dabble...