On Monday, September 21, 2015 at 10:10:42 AM UTC-4, Vincent Cheng Hoi Chuen wrote:
trader_4 wrote in
:

Just the facts.

OK. Just the facts Danno:
http://www.arb.ca.gov/msprog/smogche...bd_only_im.pdf

Thanks for providing the proof that you're wrong. You posted:

"In California, they use the dyno, but in many less technical states, they
still use the dumb procedures. "

And from the executive summary in the CA document you just provided:

"Available data and information indicate that Smog Check tailpipe testing of OBD II equipped vehicles significantly increases testing costs and inconvenience to California motorists, but provides only minimal emission benefits that are above and beyond those
that can be realized through OBD II-based inspections. The procedure for conducting an OBD-based inspection can be completed in 5 minutes or less, compared to 20 minutes for a tailpipe test, and the equipment required for the inspection can be purchased for as little as 10% of the cost for the analyzer and dynamometer needed for tailpipe testing."

Even CA agrees that there is little benefit to dyno testing, that it takes
4 times as long and that the eqpt costs 10x. If CA is still doing it, then
it's CA that's dumb, not the other states that used OBD.