I figured you did, just curious if you had another way to "fix" them.

 

If your cats are CLOGGED because you were running too rich deleting the cats with LS1Edit won't solve the problem because the cats are still CLOGGED resulting in excess back pressure which causes driveability problems. You need to gut your cats. I used a plumbers snake attached to an electric drill to gut mine. Got the O2 Simms from Thunder Racing in Baton Rouge. If you order from them be sure you tell them what connector you have when you order. I had to send the first pair they sent to me back. The KEY in the connector was wrong. You should see the output of the O2 Simms on EFI Live V5 or AutoTap. It's a perfect square wave. The PCM will NEVER figure out that the cats are gutted and that your running O2 Simms with at DC output that perfect.

 

Thanks... That is the plan, to remove the cats completely. I believe Jeff's question was what will I do for the rear O2s once the cats are gone. That is what I will turn off with Edit therefore I will not need Simms.

 

Well, the cats dont seem to be the problem. I had them tested today and they were only causing about 5lbs of backpressure. I opted to go ahead and take them off anyway. I forgot my laptop so I have only driven this afternoon with the SES light on and will turn it off tonight but I dont think that is going to make a difference. But... It sure is a lot louder now.