Thanks for the ideas. I actually already have a compression tester but it is at my parent's home in CA. I guess that I will have to buy another one. I just hate having to buy the same tool over and over. I will change out the O2 sensor and check the compression when I get the truck back. I will pull the codes with the tool that I bought and try to isolate any further problems.

Rome
1994 Toyota 4x4 SAS pickup/2RZ/R151F=244:1!
1987 Toyota SAS pickup 37" MTR's
1993 Nissan NX2000 Dropped pocket rocket