Quote Originally Posted by doc_rock View Post
I've got grounds everywhere - the thermostat housing is a remote setup, so i tapped into that and ran a ground from that to the block. ECM grounds are at the back of the driver's side head where they were originally. body to block ground is back of the passenger side head, where it was originally - and another ground ran from body to battery.
The datalog is driving me nuts. I'm not sure if it's something with the serial to USB connector, the ECM, or the laptop. I can't reliably reproduce it, and there doesn't seem to be any method to it. Sometimes it logs for a few minutes, sometimes only for a few seconds. ALDL connectors all pin out with 5v, ground to ground connection is solid.
Stupid question, not using an inverter are you?