Plugs and wires have about 12k on them. Manifold was cleaned over the winter as well.
Its not really a steady high idle, it goes between 1200 and 1500.
TPS voltage is .98 to 4.89.
I did take of the UIM and checked out the gaskets. It looks like the ones for two of the cylinders were not sealing properly. So I am guessing that they are leaking air, and creating a lean condition. I also checked the spark plugs and they are looking pretty white, which would indicate a lean mixture. So I am going to replaced the gaskets and go from there. I will update this thread with the results.
-Mark
