Alfa 166 help!!

[freestylextreme]

Ive been offered an alfa 166 2.5 V6 24V auto realy cheap , BUT its been took on a test drive today by the garage which took it in part x and its driving some what low on power , its been put through diagnostics and everythings ok, all thats been found is a moulded plastic pipe which connects the inlet manifold to the crank case breather is split , could this be the reason for lack of power???? the engine runs ok but its just lacking power ?

Help!!

[freestylextreme]

Its just what im being told so i thought ild be upto speed before im lumbered with a nail. It has been unused for a while so it may be more down to that? Thinking about the pipe it wouldnt make sense that causeing any issues