P code expert?? What's the trim "system"?

[kevinkay]

I pulled out everything up to and including the throttle body again, cleaned up that little rubber hose that the idle control vales pushes into. Put it all back together and still have that change in my idle - very slight, only in drive with my foot on the brake I feel a little roughness/jump in the idle. I conclude that I have made the intake "tighter" and less leaks which is making my trim code more focused and felt with the idle???
I am starting to suspect my MAF.
There is an after market new MAF for $18, might be worth it to use it as a tester.

YES - I am "throwing parts" at my issue..... a new car one pice at a time!!

Thanks for all the input