Smogging in CA
Regarding smogging in CA, there are actually two separate issues (just did it last week). RPMs and TCS. When looking for a smog shop there seemed to be two different kinds, those that charge about $40 and those that charge about $60. Of course I started with the $40 shop. The $40 shop tried to clamp onto a spark plug wire to get an RPM reading. Didn't work. After an hour of watching the employees paw over my car, leaving a grease trail on floor mat and engine cover, and what seemed like incessant revving of the engine, I was told they couldn't they could get an RPM reading, and therefore, couldn't smog the car (no charge).
The $60 shop had a little black box that was laid on top of the engine and gave an RPM reading. (My belief is that the shops that charge more are doing so because they are using the newer equipment, which can detect/read RPMs on a car like the NSX. However, I could be wrong). My local Acura dealer could provide no insight into this issue.
After they get an RPM reading, then they need to rev the engine to whatever RPM level the DMV requires, with the car in gear. The second problem I encountered (after the RPM issue) was that with the Traction Control System (TCS) on, the car interpreted the spinning of the rear wheels faster than the spinning of the front wheels (which weren't moving at all) as though the car were spinning out of control and therefore would automatically apply the brakes, which prevented the car from reaching the RPMs/speed necessary to pass the test. My problem was the TCS "Off" button didn't work. As long as your's is working you shouldn't have a problem. My local Acura dealer provided no help disabling the TCS, however, 5 minutes on this site and I had the answer. Pulled the two (couldn't find a 3rd referred to in some postings) connectors from the TCS controller (located behind driver's seat, head level). After that car tested fine and was smogged.
I just brought the car to CA and was eager to get this done and to get the car registered before the higher DMV fees go into effect, I made it.