Having problems with my 2wd saph overfuelling, i've sent the ECU off to get tested because the CO screw doesn't seem to work, we've done a compression test and that was fine. We also done a vacuum test on all 4 cylinders and we were loosing 30% on cylinders 2 & 3, is this a lot??? All the sensors have also been changed.

 

You shouldnt loose that much vaccum. 30% is quite a lot.