[a2-16v-list] O2 sensor ground.

[Steven Arguello]

The Bentley talks about a ground for the green O2 wire shield. Where  
is it located? Is there a ground to the exhaust anywhere? (for the O2  
sensor). How many grounds are there on the head? I bought my GTi with  
a hacked hybrid CIS_E/Motronic set-up. They had a Motronic throttle  
body, 2 wire idle speed valve, CIS-E ECU, ignition module and knock  
sensors and knock sensor CU(I thought) injectors and airbox where  
Motronic. It barely idled but at least it was hunting, at anything but  
idle it ran great. The harness is split open and has wires running  
everywhere. Any help is greatly appreciated.
Steve