Okay, here's the deal:
Talked to a parts guy this afternoon. He is smart. He told me that assembly line streamlining from 2005 on mandated that the offensive primary throttle return spring be eliminated. Sort of.
In the 05/06 TJ's, there are two springs: one in the throttle body, one on the automatic transmission linkage. For those of us with 6-sp. transmissions, well, we get to suck it up and do without. As he stated, "You're tough: you can take it."
Well, I'm tough, but I can't take it. I paid serious bucks for this horse, and I want all of the springs I'm entitled to! So, today, I made a pilgramage to the local OSH for a look-see, and ended up filling the gap quite nicely. My throttle response now works as expected.
More information is available at:
http://207.13.104.8/users/jdadams Check Hidalgo's Private Garage for the information you seek. If this was DC's idea of cost-cutting measures, I am not amused.
-JD