MSefi.com read only forum (Jan.15,2018)

I found soem useful info whic lists all the manufacturers Coil On Plug Vehicles, it also give a diagnosis with a scope. http://www.autonerdz.com/downloads/copman.pdf

bump!! Nobody knows if the positive voltage of the VR sensor is supposed to go first?? Reading the Megamanual it describes it as going first, but the diagram doesn't jive !!

I am a bit confused by this GM HEI diagram given at megamanual


http://www.megamanual.com/ms2/heiest.gif
It looks like the VR signal should be -ve first??

Then at PICOTECH they have the +VE voltage first on the VR Sensor I need to confirn how too hook it up to the module.

http://www.picotech ...