Arthur,

I will remove the OVP and check to see if it has been updated. I will post here tomorrow what I find.

JimY,

Not sure if the wiring harness has been replaced. It hasn't been replaced since I've owned in the last year. It looks as though the temp sensor is working though.

It has been suggested that I might have a bad O2 sensor or a vacuum leak. Would either of these cause the sluggish performance?

Thanks for the replies,

John B