Hmmm... I'm confused now... there should be no 'hole' to where you could spray anything 'into' the throttle body..
Right here, into the inlet:
![accufab1.jpg](/proxy.php?image=http%3A%2F%2Fwww.vortexbuicks-etc.com%2Faccufab1.jpg&hash=0f45b1300add5ba510d3d1d83da3db14)
We may need to check the base of the EGR for vacuum leaks:
http://www.vortexbuicks-etc.com/tuning.htm
I did the "knuckle rap" test of the MAF while idling. If it's bad it's supposed to stall. I know this won't find 100% of bad MAF's, but he tried another one without change as well.