To somewhat finalize this post I switched the oxygen sensors around and the shuddering stopped. I drove over 170 miles last friday and it ran pretty good. None of the symtoms I had before. I erased the codes and they didn't come back. I also added the Lucas fuel injection cleaner to a tank of gas. One more thing is I checked the alternator output with the engine running thru the battery. At first it stayed around 12 and did not go into the 14 range as it should. I shut off the engine and loosened the belt a little bit. Restarted it and the belt made a little squeal and then the amperage went into the 14 range. I don't have a digital tester. By the way could someone tell me how to change my e-mail address on here. Thanks for the help.
Mike
