Roger on the injector. Dissabembled it again yesterday, cleaned all surfaces, and re-installed. Still leaks. Ordered a replacement.

Also, I ordered a splined socket (PP4Benz) to see if tightening the precahmber nut would resolve the compression issue. As best I can tell, only the first cylinder was checked for compression. Without knowing what the results were beyond "OK" and without knowing what the other 4 cylinders showed, I can't of course, say if overall compression is good. I'm hoping that I don't have a head gasket or head problem, and am thinking I will just keep an eye on this for the moment. Any thoughts or experience with this one?

Injector pump pressures were between 320 and 340 PSI, which I undertand is fine--minimum is suppoed to be around 270.