Hi Scott,
Any additional information you can post on the "What" you did and "How" you got there, will be a big help in figuring out anything that may resolve your dilemma.
Pictures help a lot, even from a cell phone camera.
Since you have an '09, it is probably a fly-by-wire and if the venturi is a straight bore Ron's business card method would have positioned the throttle plate properly for the groove.
If the venturi has what I refer to as a contoured shape, ie: the walls follow the shape of the throttle plate until the plate reaches a point of opening up, then you would have needed to use an OBDII scanner to read the Throttle Plate "TP%" idle position while the engine was warmed up and running.
Once you had that data you would have manually positioned the throttle plate to match that reading by monitoring the OBDII scanner and marking the wall to reference the idle position for the groove.
Checking the TB for any wall leaks is important as well, a few of us have experienced that little detail.
Needless to say, a good vacuum is the grooves best friend.
If all this makes sense and reflects what you've already done then I would echo what Ron has told me... check your work... I did... he was right.
I've grooved my generator, lawnmower and my Hyundai and after doing some "lab-style" testing on my generator, found that what I thought was a good job on the groove could have been better. After going back and "Making sure" the groove was "full and complete" I reran my test and got the results that one would expect from a proper groove install.
You want to remind yourself as you go that doing the groove "properly" is a learning experience in itself... patience is a very helpful tool in that regard and you'll have a number of "ah-ha" moments along the way.
Take the time, pull the TB and go over it again making sure the bit has gotten to the depth and angle that it should. Check for any possible leaks (wall breaks) and vacuum lines. One never knows, with the materials they use these days you could have a crack in a plastic line that would normally go unnoticed.
We're all here
Karl Fortner
Tacoma, Wa.
