.. . This year was the first for my required Arizona Department of Environmental Quality (ADEQ) emission test; a requirement for annual registration. So before I drove the 2004 Dodge Cummins down to the test facility, I call ADEQ for protocol.



I asked if I could go through the “OBDII Only” lane, they said yes. Well bullshit-me if I didn’t wait in line 20 minutes only for them to say I needed the running test.



Here’s the kicker, ADEQ required me to leave my truck in park, andrev the engine to REDLINE (unloaded) and let off the throttle – three friggin times!



Winging a motor at governed redline goes against the grain of everything I thought I understood about motors.



Do I have reason to be pissed, or is this standard procedure now?

That's pretty much standard procedure now. I had to do that in my work truck when it needed it. Same thing, rev it up while they check the exhaust 3 times. Of course mine was a Cat and not a Cummins. I never thought much of it.

Standard on all the diesels I have had.  I didn't have to red line them though,  probably only about 2200 RPM or so.

ETA.  All three of my diesels have been Duramaxs.

It depends on weight, not year.



My 86 6.2l gets tested on the rollers at 55mph.  GVW is ~6200lbs.

Unless your engine was cold on a very cold morning, I wouldn't worry about it.  But this time of year that engine (not a motor;)) is going to warm before you get anywhere.  B's are great engines.  I don't see why they needed anything over 2000-2300 rpms, but I don't understand a lot of things about .gov wants/needs.  I don't really work on many Dodge B's since they have a Chrysler ECM, but I wouldn't be surprised if you can get a programmer to change the rev limit.
 

WA Had the same thing last time I went in.  Is your state a CARB state (does it follow CA)?  WA does.

We're not a CARB state, yet. I just got my emissions license, but only for gas vehicles. There was a couple of dudes trying to get their diesel license,and they were struggling, a lot. I'm glad I just had to get a fleet certificate, and not a diesel one, too.

yea the snap test has been used for a while . haveing to remove the tune and reinstall the cat and EGR is going to be a drag for some folks with 05's next year .

I've never had any problem passing despite certain modifications, but I run her almost dry, fill up with biodiesel and make sure it's good and warm before the test.

Actually, I did fail once, but it was because they ran the test wrong.  I came back two days later without changing anything and passed with flying colors

the Diesel cert is a breeze ,I have all but the Diesel cert and a'm a fleet inspector fleet agent and owner as well . the problem with the fleet Diesel is the cost of owning the Opacity testing equiptment . that's why I bring ours to Gordon Darby (state run) for Diesel emission inspection .the test the ADEQ makes you take is all memerisation and a trained chimp could pass it .and if you were to take the 2 day class there is no way you would fail the test .

I don't want the diesel cert, and I didn't want the fleet inspector license either. It was forced on me by my job. You're right though, we memorized the test the night before, and passed it no problem.