Cutting out/studdering at 3k-4k

[4g63tcrazy]

I know ground straps are pretty important but would they cause the car to act up like this? I took off the ground strap from the intake manifold to the firewall, but other then that they are all there from when the car ran great last time. (Battery to firewall, battery to tranny, tranny to frame rail and I think that's about it.)

The car wont even idle anymore either. If I let off the gas the car just wants to die and goes pig rich. If I hold it at like 3k rpm the a/f ratio goes back and forth all over the place. When I drove it yesterday it stayed at 10.0 rich for quite awhile and I could barely even accelerate or drive the car.

I'm gonna go pull the harness out and see if I find something obvious..