Group, The Haynes book on the K Bosch system say's:quote. The line pressure regulator maintains a constant fuel pressure in the system while the enging is running, returning excess fuel to the tank to prevent overpressure. In addition, the regulator has a built in rest pressure valve and a shut off valve, which function when the engine has been shut off to maintain a lower (approximately 35 psi) pressure in the system to prevent vapor lock and to keep the fuel in the system from draining back into the tank, making starting more difficult.End quote. Andy, What is the part number on the fuel pump. If it is a Bosch, I may be able to tell if it's right or wrong for the car. Also, I have new rebuilt CPR on my site, I will send it overnight to try. I also will post on the web site under Talk and View the K Bosch fuel injected part I quoted in the morning when I get to work. I hope this helps John Hervey www.specialTauto.com > > > > > > > [Non-text portions of this message have been removed]