Obdii
Joined: Nov 2001
Posts: 34,627
Likes: 2,543
From: Schiller Park, ILL Member: #317
We have the OBD scan only test for '96+ cars here in IL. You don't need cats to pass, actually you don't need any emissions stuff at all. Just proper tuning. That is assuming you don't have a visual inspection. Here they don't look at anything; just give us the gas cap test and the OBD scan, 30 seconds later you're on the way home with a passing grade. 
The object is, not to delete the codes, but to turn off the MIL for each code you want to ditch. If you kill the code altogether, then the test won't run and the test center will reject you for the test based on a "not ready/incomplete" status.
Go to a good tuner and you'll be fine.
The object is, not to delete the codes, but to turn off the MIL for each code you want to ditch. If you kill the code altogether, then the test won't run and the test center will reject you for the test based on a "not ready/incomplete" status.
Go to a good tuner and you'll be fine.
Assuming your state does OBD2 test only (no sniffer or visual) just delete the codes and you will pass. I had to do this just last week for my formula and i learned a few things. Check your car with a scanner. If there is a code, kill it.
What will then happen is your car's emissions system will go into a "not ready" status, which means you can't be tested. There are like 9 monitors in emissions systems of these cars, 1 for PCV, 1 for 02 sensors, 1 for catalytic convertors, etc. When you delete a code, these monitors will need to reset themselves. Driving normally for a couple weeks after you clear the code, with a combination of highway and city driving, will reset the monitors.
Check your car with the scanner again the day of the test, as long as you have zero incomplete monitors and no codes you are ok. So for me, the midget testing my car told me i passed the test and 2 minutes later I was on my way. Nice!
What will then happen is your car's emissions system will go into a "not ready" status, which means you can't be tested. There are like 9 monitors in emissions systems of these cars, 1 for PCV, 1 for 02 sensors, 1 for catalytic convertors, etc. When you delete a code, these monitors will need to reset themselves. Driving normally for a couple weeks after you clear the code, with a combination of highway and city driving, will reset the monitors.
Check your car with the scanner again the day of the test, as long as you have zero incomplete monitors and no codes you are ok. So for me, the midget testing my car told me i passed the test and 2 minutes later I was on my way. Nice!
That is where it is headed... 
