Supercharger

[Michael Parris]

Putting this out in case someone has been there and knows the problem.

928MS kit fitted to a GTS being tuned but on throttle close oil is blowing
back into the intake from positive crankcase pressure and making smoke from
the exhaust.  It doesn't have a catch can.
They followed the 928MS instructions regarding vacuum lines.
I think maybe the blow off valve isn't working or something else amiss.
Tuning of pickup and midrange has been done but the they don't want to go
higher with this problem.
I haven't built one of these but I know some here have, any ideas?
The car is being tuned in Ashford.
Mike