northface

I've got an Audi 100 2.3E with the NF engine. Sometimes when I start it it runs ok. Sometimes when I try to start it it wont. Sometimes when I start it it runs bad, often stalls. When it runs well fuel pressure (system and control) is good, differential pressure around 0.4 bar, the EHA doing it's job as it should. When it runs bad the fuel pressure is way off. Differential pressure around 0.2 bar. I've checked the EHA current by turning ignition on but not starting. Sometimes it's at around 120mA, sometimes around 20mA, sometimes something else. It should of course be the same every time. Anyone familiar with this behaviour? Ideas? I'm starting to think the ECU might be broken. Thomas