copgtp
Your ClubGP Liason
I remember reading about this a few years ago, and I just dug this bulletin up, definitely something for people to look into before replacing other components:
http://www.4s.com/Upload/Four Seasons/documents/Tech Tips/English/4S 333 GM SYSTEM UNDERCHARGE.PDF
http://www.4s.com/Upload/Four Seasons/documents/Tech Tips/English/4S 333 GM SYSTEM UNDERCHARGE.PDF