I’ve only seen awd cars get the obd monitor treatment. Air care stopped putting awd cars on the dyno a long time ago. Apparently a very high horsepower evo 8 bucked hard and was damaged. This was before Colorado went carb.Are you sure about this part? I don't see on the Air Care Colorado site that's called out. It seems that that once you move into the cars 8th year they require an emissions test, which can be waived if you pass the Rapidscreen roadside tests you see setup near highway on ramps and such. Not sure where it indicates that an OBD scan alone does it. Everytime I go to AirCare I see cars run on the dyno and either fast pass in the 3 min test or move onto the full 10 min test, either way they all run on the rollers.
Currently running full stage 2 with APR catted downpipe on a '16 GTI, which if I read the Aircare site correctly "Most vehicles do not require an inspection until they are eight years old." https://aircarecolorado.com/faq I'm guess I'm not getting tested hood up on rollers until '24?
BTW anecdote about the CO referee process...I have an '84 Jetta GLI with full 2.0 ABA motor swap including '96 OBD1 management. Car has full Techtonics 2.25" exhaust with Bosal 4/2/1 long tube headers with a tiny half sized Magnaflow pre-cat instead of a full sized one located about 18" behind the stock location. Definitely not stock. I went through the normal emissions line a few times over the years and just played dumb and it worked. Got some static once during the visual and the inspector brought his supervisor over and they said "let's see what it does on the rollers" and the car passed.
After I sweated through that I decided to do the full referee procedure and decided to get the car certified emissions wise as a '96. I scheduled an appointment at the Broomfield AirCare facility (heard the ref there is a car guy and swap sympathetic, if done right) and sat in a room while the inspector went over the entire car for about 30 min, including running on his emissions dyno. I have the OBD scan port hooked up, all evap stuff hooked up, and as mentioned the micro-cat, logo and serial # side down for visibility, and it passed. Guy complimented me on my swap and passed the car. Next emissions test I have to bring the paperwork he gave indicating it's a '96 as far as the inspector is concerned and I run through the regular line.
Subaru’s and other awd cars don’t get dyno’d anymore. I guess air care wants to avoid that costly situation.
iirc every single fwd and rwd car hits the dyno. But I can’t say with certainty
also, the rapid screen is twice a year right? I wonder what that consists of.