I live in one of the lucky handfuls of counties in WI that does biannual emissions testing. I'm due for a test in February and I'm going to be deleting shortly after so no worries for another 2 years but should I expect any issues with the inspection down the road? They don't do a visual here, just a plug into the OBD port to make sure everything is working as intended.
From the WI DMV website
- Check Engine Light Bulb Test
The inspector will perform a test to ensure that the vehicle's check engine light is functioning properly. This is accomplished by turning the ignition key to the on position without starting the engine (KOEO) and looking for the check engine light while the vehicle is running (KOER). The vehicle would fail either portion of the inspection if the check engine light does not illuminate.
The inspector will connect the testing equipment to the vehicle's onboard computer port (Diagnostic Link Connector). If the vehicle cannot communicate with the testing equipment, the vehicle will be rejected from further testing until this condition is corrected.
- Readiness Monitors
If the communication is established with the vehicle computer, then the OBD test can proceed unless unset readiness monitors exceed the testing requirements. For the 1996 - 2000 model year vehicles, a vehicle can have up to 2 readiness monitors unset; for 2001 and newer vehicles, only 1 readiness monitor can be unset. If the unset readiness monitors exceed the requirements, the vehicle will be rejected from further testing until this condition is corrected.
- Check Engine Light Commanded On
If the vehicle's check engine light is commanded on due to an emission component that is not functioning properly, then the Diagnostic Trouble Codes (DTC) are recorded and provided to the motorist. The vehicle will fail this portion of the inspection if the check engine light is commanded on. The vehicle will need to be repaired and brought back for a reinspection.
Will inspection be as simple as unplugging the tuner so they can run their check? Is reinstalling the emissions crap and reverting back to stock tune an option? Registering at a heavier weight is an option, i think 15k+ is exempt. It is $150 more per year but that's worth not having to reinstall then re-delete every other year.