Hi, just saw your comments. VW VR6... that sounds like a fun adventure. I'm not familiar with that motor... what type of ignition system does it run? Does it have a Motronics box controlling injection, spark, etc.?
Also important, you didn't mention what car you are putting this VR6 engine into. What year and model (911, 912, etc.)?
Generally, my solution fixes about 90% of the problems that occur, so keep talking and we'll work this thing out.
You can also see info on my website
Home
Thanks much ... Bob