Check vac pipes for leaks as this can cause over fueling, also the CTS can. Failing that it wouldn't hurt to put a standard FPR on, I think they are 2/2.5 bar, but dont quote me on that!!

Na m8 it standard

Anything else been done to the engine?

My dizzy engine has got cream injectors and it was running a 3 bar fuel pressure reg could this of caused the over fueling problem that was damaging the lambdas?

So what the best thing to try next n thanks a lot

Sounds more to me like its over-fuelling for something else and that's damaging the lambda.

Lambda might be adjusting the fuel trim while its reporting it but looks to me like that isn't your main fault.

Lambda sensor will only report the quality of the burn and is used to trim the ratio a bit but its not the cause of big problems that can't be trimmed out.

[Edited on 09-11-2014 by Ian]

It isn't showing any faults m8

Can you read the fault codes from the ecu, lamda sensors don`t normally just fall to bits.
If it`s smelling of fuel badly then there maybe another issue.

Been using cheap 1s m8 jus bought a Bosch 1 see how long that lasts

Buying proper bosch ones, or cheap ones or second hand ones

Bout 4 to 5 weeks m8 n yh I put a new 1 in and it sound and the old 1s av fell 2 bits rattling inside m8

How long is it lasting on average? Is it definitely the lambda? For example have you tried cleaning one up and putting it back in?

Hi can any one help me. I have a c20xe from a cavalier it as ad a full rebuild 6 months ago and since then I have replaced the lambda 4 times and wen it fails it won't let me rev and it stinks of fuel like it's running rich. Any help much appreciated