Hi all, just joined. Bought a 05 Vectra 2.0 T sxi, emissions light comes on car loses power. Feels like its hit a rev limiter if you put your foot down. Then after a few days it goes out and it goes like a scalded cat!! Then it comes back on again and i'm back to no power (Boo!) Bulb replacement light continuously on too. All lights working tho!! Anyone help? Cheers fellas.