CarHopper

Went to a car gathering this evening, roughly 3-400 cars, all sorts. Then I was just really diving into the C63 and driving the hell out of it / loving it all night. But something was missing. It's loud and angry with secondary cat delete already in place, but I need more.

So, is there anyone out there that has SUCCESSFULLY passed an OBDII inspection with catless long tubes?

Gents, been here a while. Please save the "I have this or that and passed." I'm in NY so the sniffer does not matter. I also have good friends in many places that work at shops and will get me through the visual inspection.

I strictly just need to know if anyone has had monitors set to ready with catless LTH's...

For the tuners who may see this (cough cough Eurocharged cough)... I'd love to see if we couldn't find a way to get the monitors to set to ready through tuning. This has been done on other platforms so there just has to be a way, no?

Anywho, just me dreaming over here.

EkS

Are you allowed to have ANY "not ready" monitors? I know there are some states that don't allow any, and some that allow 2.

kb24forlife24

I'm curious to know as well.

CarHopper

I will call and ask. I'd like to be safe and have all of them set. However, I have passed before with 1 not ready. I think it depends on year and such, but I shall call and see what it really comes down to.

This question has come up before (Catless LTH and pass inspection) and never really has a definitive answer and how-to's. At the very least, I aim to lay this topic to rest with a firm yes it can be done or hard no, it cannot.

I am Jeff

The only person that I know of that has passed with a catless setup is Mthis. I'm not sure about the whole process that he went through, but I'm also curious about the specifics to passing with a catless setup in NY.

mthis

In NY u can pass with 1 not ready.
2 u fail.
i pass every year. i just have to buy new 02 sensors to pass.

CarHopper

So you have to buy the sensors because they get fried?

Why not have one set you leave in for inspection and another that you just let go?

Also, what is your tuning situation? Stock map for inspection?

mthis

yea. they go quick
not a bad idea.
some tunes need to be adjusted mine rite now hasn't been and the monitors are turning on. so this is good. if 1 or 2 monitors turn on the tunes good to go you just have to drive alot to turn on all the sensors minus 1 the cats bc thats turn off on your ecu that will never turn on.

CarHopper

Thanks for the info mthis. That's all I needed.

kb24forlife24

Would this method work for CA smog tests? They're all OBDII now.

CarHopper

Doesn't cali have the sniffer?

You'd probably fail the sniffer.

kb24forlife24

Nope. No more sniffer in CA for 2000 and newer cars, just OBDII inspection.

CarHopper

Then you're in the same boat as us in NY.

EkS

If the inspector doesn't look under the hood, then you're good otherwise you'll fail. LTH are still illegal...only if you get caught

DATURK

This is very interesting, anyone knows TN laws???

C63-AMG

My car passed in MA. All monitors are good and the car has a tune. I actually have a bluetooth ODBII tool and check the monitors with my tablet every now and then.

HardC63

Just get it tuned after installing your LTH - w/o cats.

The tuner should know to turn off the emission codes and you'll be fine. I've done this to all my cars with no cats and they all pass.

jvanbrecht

Check your laws. Mine is due in 2 or 3 weeks and I am still getting secondary air injection failure. MD apparently allows for you to get an exception (need emissions to renew registration) if you spend a certain dollar amount (someone said $300, not sure if that is valid), and you fail three times. Basically, you are showing you tried, but the cost to get it to pass would be an undue burden, and they let you fail it and still renew registration.

I am Jeff

Turning off the rear o2s will not pass obdii inspection. The car will show 2 not readies and you will fail your inspection.

CarHopper

You sure its 2, or 1?

mthis

cars
From 1996 -2000 (2) not ready will pass.
from 2001- currently u need 1 not ready to pass.

NY state.

CarHopper

^ Right. But will each primary o2 sensor be its own monitor? Or are both o2 sensors on the same emissions monitor?

mthis

Anyone want to try this and see if it works?

mthis

Both should be on the same monitor.

I am Jeff

I was mistaken, I was able to pass my NYS OBDII emissions inspection with my rear o2's turned off.