could this be a ground problem?

Hello, what is the quality of your coil? I'd look at the coil itself as a possible cause if lack of spark remains a problem. Have are you verifying this? What test have you performed to verify you "not enough spark"?

Cheap aftermarket ignition coils are junk right out of the box! .. NAPA Echlin ignition parts are very reliable - furthermore - make SURE coil primary wire connector pins are not damaged in any way - say from probing with test light.. Common condition after ‘novice’ testing.