Fuel pump is definitely running (seating and unseating the MAS relay was the first thing I did and then checked the fuse on the OVP). Its delivering volume, but maybe not enough pressure. I've got a Matco fuel pressure tester, and buried away in the case is a hose for testing CIS. I guess I need to hook it up and find out what I'm actually getting at the unit. My boss said he has seen the fuel pressure regulator diaphragm break and contribute to messing up the pressure at the EHA.