A hole in my inlet manifold

Hiya I had a issue were when starting my 1.4i 2002 Ford Fiesta it would just die until the engine was warm I had a few mechanics look at it and 1 person said it was the exhaust so I got a brand new 1 put on then it was still doing it but was a really loud humming noise from the engine which we found was a hole in the inlet manifold which has now been replaced the only issue I have now when it’s cold it’s letting out loads of white smoke and I don’t know what’s up with it as we’re needing to by pass the pcv valve as if that’s on it won’t start at all so we ordered a brand new 1 from ford thinking that might be the issue but it’s not as with the new 1 it won’t start at all any ideas will be hugely helped