I'm going to replace my broken dp with a ZZP one that has a gutted cat. I know I'll be able to pass visual inspection, but if I had got an angled O2 sensor adapter for the 2nd sensor so I don't throw a code, will I have any potential issues with passing inspection?

Not once have i had them hook up a sniffer to my exhaust, it's always been through the OBDII port.

 

I don't know how Maryland is, but I passed emissions last year when my car was catless.

My GMR S3 PCM tunes out the rear O2 sensor, and as long as I have no codes present, I pass.

PA only checks the gas cap & looks for emission codes. Thankfully.

To answer your question, an angled defouler should prevent you from throwing a code.

 

MD is pretty strict. My DP has a Cat, so I don't know if you would pass or fail...you can always just give it a shot

 

i could delete your code with hpt, its illegal but would work.

 

Except some states have caught on, and they scan it, pull the battery, then scan it again and if it still reads passed then they still fail you.

 

it wont still read passed, should reset the drive cycles.

 

It would read passed if defeated in hpt. My car does pass emissions but I've flashed it too soon before I needed to be inspected and couldnt get the drive cycle done so I just flashed a tune with all the codes tuned off and it reads passed the instant the car is started the first time.

 

If the battery is disconnected then retested it will fail, the moniters won't reset with out X amount of driving cycles.

 

get a turbo XS catless DP.... thats what i have... no code before the tune. drove for about 2k miles. im not sure if i even had trifecta clear the code or not cuz it never popped up...

 

hptuner deletes the test itself, unless you have someone accually looking for the specific cat test, you will be fine. mine has been deleted many years, and many emissions tests, and never had an issue.

i guess it depends how smart they are i guess

 

More info on fooling readiness tests?

 

why not just find someone who will take a 50 dollar bill?

 

Good luck on passing with a gutted cat. Should be fairly obvious that the cat is gutted by just listening to the damn thing lol

 

this always works... !

but be careful. ask your friends. dont ask the tech who is testing your car

 

Missouri is a bit different, it's a state test that can't be faked. I've tried.