Anyone have issues with a very rich bank of cylinders as opposed to lean on the other bank,, (injector driver??) thanks

 

The injector drivers are paralleled back at the ECM. It's more likely a problem with the injector wire harness, mechanically stuck injector(s), fuel distribution (rail) problems, or a serious vacuum leak on one side.

 

I had this problem not long ago and found that one of the injectors had half the resistance of the other ones, (Accel 30#) replaced all 8 with 30# Bosh units from TPIS, problem came back couple of weeks ago. I figured that maybe the driver got weak from the bad injector so I replaced the ECU with a Delco rebuild and so far so good. I hope the rich condition didn't take out the cat but don't know how to tell. Thanks for the input. Can't know enough, hope I'm not too old to learn. thanks again