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[mark.adams]

What is the history with the cat?? as in is it a GM one??

[TonyBrister]

No it isn't. the garage have tried another patern one with exactly the same results, but experts at cat manufacturers dont think its the cat because of the very high HC..

[mark.adams]

And there's definitely no leaks in the exhaust system?
Both lambda sensors changed?
Is your EGR blanked off?

[TonyBrister]

No leaks in exhaust and Im sure the garage have tried all that

[TonyBrister]

YIPPY I'VE GOT IT BACK........

After all that it was the CAT...
It turns out that patern part cats don't work on the 2.2  but they work on the 2.0...
The first thing the garage did when the emissions were high was to buy a patern CAT the same as the one I had fitted last year. The emissions were exactly the same..so even speaking to CAT experts they reconed it wouldn't be the cat with  such high HC. Until somebody told them that the GM CAT is a two parter with a pre-cat, aha  so upon searching around they found a CAT manufacturer in Nottingham that does type approved CAT's ordered one, fitted it and yep perfect emissions...
So the moral is, if you have a patern CAT fitted ask for type approved and get the emissions tested that way you can be safe.. how many people are buying CAT's that don't work ?
 

[mark.adams]

Hooray... well done matey.
How much was the CAT out of interest and who did it come from??

[TonyBrister]

I can find out where it came from, due to all the hasle the garage let me have it at cost which was £187.81 which is a bit different to Vauxhalls £700.....

[holtender]

I love reading about a  happy ending!

Some fine information shared on this thread as well!

[mark.adams]

I was quoted £285 trade club price for a cat for my model of car....

[TonyBrister]

Just out of interest, I have been told that LPG can burn valves out as it burns much hotter than petrol. Is there any truth in this? :-/