Car failed test on all emmision through the roof,
co=11.5
hc=1700
lambda=.998
rpm=2500
manifold vaccum is at 12inhg which is low, fault code on vehicle is manifold absolute pressure sensor but this is ok because if i take vaccum pipe off my live data shows 1010mbar which i believe to be correct and the garage the car has come from have put a new cat, lambda and sent ecu off and had new map sensor fitted. Have just checked the timing as i thoght this could be the only thing left that could cause low vac in manifold but to my dissapointment is perfect at tickover the co is fine.

any help much appreciated
many thanks
carl