In a message dated 12/4/2009 4:37:30 P.M. Eastern Standard Time,
mdrexler@ZING-NET.CA writes:

am  thinking the only
source of the pulse is a warped rotor installed by the  tech.

I would think the same. I have seen new rotors that were warped right out
of the box.  what brand were they?  later  mark  d