Interesting day at the inspection station...

[turboberserker]

Now that I live in upstate NY, I have to get BRT inspected :doh2:

I had a nice little tune all set up using COS#3... No MILs, no nothing. I took it to a place that really likes my truck, so the visual inspection was easy.

However, they plugged it in to the NYS inspection software and boom...

Evap reports not ready
O2s report not ready
O2 heaters report not ready

FAIL.

Doh.

So I start poking around. I turn on everything again... Same result. I leave everything on and make a 10 minute drive or so... Same result.

The scanner reports no data from the O2s but I can log voltage from both sets, both banks. I turned on LTFT and STFT again (set the LTFT to 0 min / 0 max), but again no dice. I've been in OLSD mode for years. The truck sat for about 18 months for mods, then I moved it up here and drove it a few months before winter hit, then sat all winter again, but since the reported voltages look right, I don't think the O2s are shot.

The EVAP can is back in and plugged in to the PCM, but is plugged. It still reports not ready.

Any ideas? :help2:

They (inspection station) suggested a nifty little work around idea (and gave me 10 extra days on my brand new plates lol), but if I can get the tune to working, I won't have to bug my buddy :)

[joecar]

You have to follow the "drive cycle" for your vehicle to get the monitors to trigger...

An example drive cycle would be:
- a cold start,
- idle with AC on and rear defroster on for 3 mins,
- turn off AC and rear defroster and start driving,
- accelerate at 1/2 or 3/4 throttle to 55+ mph,
- coast down below 25-30 mph without braking or downshifting,
- repeat the last two several times,
- come to a stop and idle for 3 minutes.

That will cause most of the monitors to trigger and run the tests... when the tests run the monitors will change from Not Ready to Ready (regardless if the tests pass or fail); if any of the tests fail the PCM stores DTC's and may light the MIL for the "1 trip" DTC's.

You have to find the specific drive cycle for you vehicle in the service manual.

Marking all the DTC's for a monitor as non-emissions usually causes that monitor to go ready... but not necessarily always on all OS's.

[rpadams]

It just happens that I passed NYS inspection yesterday with COS3 in my 2002 corvette. I ended up turning off most of the O2 DTC enablers (set to X: not reported). Now, after I do a reflash, all but the EVAP readiness tests are green immediately.

The trick to get the EVAP test to run was to set B0505 to enable. Otherwise the test will never run since we never go into closed loop.

Let me know if you want a copy of my tune or if I can help other ways. It's still a rough work in progress, but my main goal was to get my expired 10-day inspection off the windshield. Now I can concentrate on the important stuff.


Rich

[joecar]

Rich, you are correct... not-reported rather than non-emissions;

and welcome to the forum... :cheers:

[turboberserker]

Thanks guys -- my inspection woes have been put on hold for a bit, but I will try these when I get her back into the swing.