No Spark

I installed a ground strap to the FBO ECU and it still no go. Put the Mopar box on and it started.
In testing for the ground I did notice that the Mopar box has the distributor's dark brown with white tracer wire pole grounded to the case. And the FBO box has the other wire grounded to the case. Does that make any difference?
Found my paperwork and I bought it in March 2014. I'll call and see if they'll warrant it.