Thanks for the reply.

I sure am using Alex Peper's software and I have good respect for it.

From my log file I do see sensor $014 0S211 shift showing fast changes but I will have to try the guage setting you mention. I was thinking that the OS211 shift data (in the data tab) was the same but perhaps it is not ?

I'm guessing I do have a vacuum leak as per what I read doing searches on P0172 RICH code.

My mileage is still quite good I think ~ 22mpg with 75% freeway 25% street. No black smoke (just a brief/small puff if I floor it, which I wouldn't consider abnormal).

The myserious part is that I do not get the P0172 code right away after resetting the computer .. (maybe it is an intermittent leak that only shows sometimes) ..

I'm still trying to make sense of the other message I see in the data tab of "$03 Fuel System 1 and 2 Status is System 1 Closed loop but fault with at least one oxygen sensor - may be using single oxygen sensor for fuel control" ..

Thanks again for your suggestion on guage setting!