Injector ground

I already have a thread but I have a new development. I have figured out that my injectors are not grounded correctly or at all and was wondering were the ground is for the injectors and is there a way to check them i.e. a way to ground out the injectors to see if that works. I changed my chip and put one in with 0 pulse on the fuel map all the way across the board(uberdata) and the car still ran stupid rich with at 13.2 afr at idle and fuel standing on the pistons.any thoughts?

i believe injectors pulse ground

so what exactly does that mean?

Ok so I have figured out what that means and was wondering if the fact that I have the ecu sitting on the carpet and not on the metal has anything to do with it. When I put my chips down to zero all the way across the board I can still run the car and rich as hell like the ecu is running off of some other map. I have talked to a guy that I am taking it to to dyno tune it and explained what I have done with the chip and he is confused about what it could be. Any thoughts. Keep in mind that before I did the rebuild that this did not happen so I have disconnected something to make it do this.