Catless DP with disabled code

[pittperson]

Anyone know if you will pass emissions, in a state that only does OBD testing, by disabling the right codes?

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[Rocksandblues]

no

 

[MisterSkiz]

You will have to use a type of ODBII monitoring program that will give you the status of the emissions monitors in your ECU.

I bet the after cat monitors will say "not ready" or something to that effect - if that is the case, you might pass in your locality if they allow some monitors to not be not ready, while others appear to be ready.

Look up your local emissions passing criteria and compare it to your readiness of the monitors and see what lines up.

In the communist state of California they are actually pulling the checksum of the ECUs to see if they have been manipulated from factory and if they have BOOM you have to put everything back.

Something like a JB4 would circumvent this- but they do a visual inspection too...sooo

I have found this for North Carolina: (assuming your user info is correct)

https://www.ncdot.gov/dmv/title-registration/emissions-safety/Pages/emissions-inspections.aspx

https://deq.nc.gov/about/divisions/...gram/emissions-inspection-results-information

• "Not Ready" Waivers
  
  In order to receive an emission inspection the vehicle's OBD monitors must be in a "ready" state. If a vehicle has too many "not ready" monitors, the vehicle will be rejected from receiving an emission inspection and receive a Not-Ready Rejection VIRS. The vehicle must be driven in order to set the OBDII monitors to a "ready" state. Some vehicles become "ready" very easily while some are more difficult to become "ready".
• Acceptable limit of "not ready" monitors are:
  
• (2) - for all 1996-2000 model year vehicles
  
• (1) - for all 2001 and newer model year vehicles
• 1. The vehicle is rejected from receiving an emission inspection because it has too many "not ready" monitors, exceeding the acceptable limit.
  2. The customer attempts to get the vehicle's monitors to set by performing any of the following steps.
     1. Repairs, and/or
     2. Normal Driving (daily driving habits, i.e. trips to store, work, activities, road trips, etc), and must be documented by a reasonable mileage change between the first and last VIRS or
     3. A manufacturer's drive cycle may be conducted in place of driving the vehicle for several days. The drive cycle performed must be presented to DMV personnel.
  3. The vehicle returns for another inspection and again has too many "not ready" monitors, exceeding the acceptable limit. Another Not-Ready Rejection VIRS will be issued. At this point a "not ready" waiver can be issued.
  4. Owner takes the two Not-Ready Rejection VIRS to the local DMV office along with the manufacturers drive cycle, if one was used. If a "Not Ready" Waiver can be issued, DMV personnel will make the proper arrangements with the inspection station where vehicle will be inspected. Under the supervision of DMV the inspection station will proceed with the OBD inspection making special allowance to complete the emission inspection.
  5. The vehicle must pass the visual tamper and safety inspection portion of the emission inspection before a waiver number can be entered into the analyzer
• There are different scenarios when a "not ready" waiver can be issued. Please contact your DMV License & Theft Bureau Office for specific information. Below are the general procedures for the "not ready" waiver.
  

 

[3rdGearEvo]

Most likely yes you’ll pass. I can’t say absolutely with the Supra but I had a straight piped Evo with all readiness monitors set to “ready” through the tune and passed OBD inspection with no problem in NY. Same should apply with the right tune on the Supra.

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