Thanks for confirming. I cleared codes and tried to start again before I pulled the timing belt and valve covers - no new codes. I could see data from the ESS in the measuring blocks when I tried to start - is that enough conclude that the ESS isn't a problem, or do I still need to pull the sensor and check resistance?Relay in or out... it doesn’t matter, if the jumper is there. The relay is being bypassed.
I’m curious what’s happening with the engine racing symptom...
The engine racing symptom is as if I floored the accelerator immediately after starting the car. It's really quick - drops back down to idle almost instantly. This thread http://forums.tdiclub.com/showthread.php?t=138997 describes the issue. In both cases when it's happened to me, I found the rubber o-ring had come off of the solenoid. Put it back on and all is well. FWIW, I also had the limp mode issue that Stealth TDI described.