After some testing,and evualation. It was determented that both cats were bad, they have just been replaced, along with new plugs, and wires. The car has a very slow accelration. What next?
Very Slow Accelration on 1993 Lexus LS400
Sounds like you may have other problems taking out the cats. A misfire or fuel control problem could be the cause. I would recommend you find a good diagnostic technnician in your area that can nail down the root problem. Ask your friends for referrals.