Thanks again Rich. I installed a new Bosch o2 sensor so I'm ok there. I need to find a place where I can tweak the mixture screw while hooked up to the machine to see if I can get it to pass. If not I'm thinking I'll replace the cat. conv. I'll report my progress.

Hi gmercoleza. My cap and rotor have about 35k miles and the wires checked out good last time I looked. The plugs have about 10k so they should be good as well.