[hz_diesel]

So I recently failed my MA state inspection on my 2012 n55 e92. I have a cobb pro tune and high flow cats with no o2 light (without the cobb on).

I can't really figure out why I failed. My sheets show all ready/pass or not supported. Has this happen to anyone else? I unmarried the cobb and putting on my mufflers soon to go through MAC...

[Johnny Boost]

It could be that you didn't drive your car long enough to reach readiness OR maybe it's that your HFC cannot pass emissions. Many people have said that HFC will not pass emissions.

[hz_diesel]

Originally Posted by Johnny Boost

It could be that you didn't drive your car long enough to reach readiness OR maybe it's that your HFC cannot pass emissions. Many people have said that HFC will not pass emissions.

However those who have said the HFC did not passed emissions. FAIL the o2. I however passed. Also as I mentioned in my original post, everything is checked for ready or pass.

[Johnny Boost]

Originally Posted by hz_diesel

However those who have said the HFC did not passed emissions. FAIL the o2. I however passed. Also as I mentioned in my original post, everything is checked for ready or pass.

I did not notice that you passed o2. It may be the other part of my post where I said you have not driven enough miles. When you uninstall the Cobb tune, you have to drive through a full cycle before you can pass emissions.

[hz_diesel]

Originally Posted by Johnny Boost

I did not notice that you passed o2. It may be the other part of my post where I said you have not driven enough miles. When you uninstall the Cobb tune, you have to drive through a full cycle before you can pass emissions.

I am starting to think that may be the issue but I have already driven it pretty extensively.

[turbo_chris]

It was the catalyst and catalyst heater monitors. Do you have the Cobb tune set to suppress O2 faults? showing not ready on cat faults is the same "not ready" in most states. Every new car has a cat, no reason for it to show up as not supported. Remove the Cobb tune and drive it for a few days without clearing faults. Then the monitors should come online and allow you to pass (as long as you don't throw a code for the downpipe)

[OneMoreAlex]

Looks like the cobb is interfering with the 02 sensor. That's why you see it stated on your emissions printout saying it's not supported, if it was a CEL it would have said 'fail' instead. I do not have cobb so I can't confirm that's exactly why but I'm pretty confident that's the cause to your failure.

I would remove the cobb and buy a cheap readiness monitor, or have autozone test for readiness, then go back for emissions testing when you know for sure that everything is okay.

[hz_diesel]

Originally Posted by turbo_chris

It was the catalyst and catalyst heater monitors. Do you have the Cobb tune set to suppress O2 faults? showing not ready on cat faults is the same "not ready" in most states. Every new car has a cat, no reason for it to show up as not supported. Remove the Cobb tune and drive it for a few days without clearing faults. Then the monitors should come online and allow you to pass (as long as you don't throw a code for the downpipe)

I don't have the cobb set to suppress faults so not sure if it is set to do that by itself. I remove the cobb atm and plan to take it back in tomorrow. I might have been flagged for MAC.

[C230AMG]

what hi flow cats you have?

[hz_diesel]

Originally Posted by C230AMG

what hi flow cats you have?

Wagner Hi Flow, has about 30k on them.

[drod413]

Did everything work out or were you flagged for MAC?

[hz_diesel]

Originally Posted by drod413

Did everything work out or were you flagged for MAC?

I was flagged for MAC. The guy although very polite was a dick. Everything was back to stock and he refused to raise the flag. I had to go to bmw to get a invoice saying I had stock software and etc. I did that and still he made me wait a month. He probably would have made me wait even long if I didn't keep calling him.

[C230AMG]

Originally Posted by hz_diesel

Wagner Hi Flow, has about 30k on them.

We can conclude that the cats used on the aftermarket downpipes are of inferior quality. Most of these cats are not gonna last like the OEM's that requires them to last 100K miles without failure meaning no CEL's lit up.

[hz_diesel]

Originally Posted by C230AMG

We can conclude that the cats used on the aftermarket downpipes are of inferior quality. Most of these cats are not gonna last like the OEM's that requires them to last 100K miles without failure meaning no CEL's lit up.

How can you conclude that? Read the whole thing. I said I did not fail the cat part of the inspection. My o2 sensor was ready.

Edit. I do know that a high flow cat will eventually throw a CEL. I am at 30k with no issues using the cat so far.

[C230AMG]

Originally Posted by hz_diesel

How can you conclude that? Read the whole thing. I said I did not fail the cat part of the inspection. My o2 sensor was ready.

Edit. I do know that a high flow cat will eventually throw a CEL. I am at 30k with no issues using the cat so far.

Go research other guys in the forum with aftermarket downpipes and you will conclude the same.

[hz_diesel]

Originally Posted by C230AMG

Go research other guys in the forum with aftermarket downpipes and you will conclude the same.

I have seen the posts... I am not arguing with you about them eventually throwing cels. It is obviously the cat will eventually break down. YOU however worked it to sound like you concluded it from my situation after asking for the brand of the downpipe I am using.

[C230AMG]

Originally Posted by hz_diesel

I have seen the posts... I am not arguing with you about them eventually throwing cels. It is obviously the cat will eventually break down. YOU however worked it to sound like you concluded it from my situation after asking for the brand of the downpipe I am using.

Of course we are going to base on your set up, what start speculating???

[hz_diesel]

Originally Posted by C230AMG

Of course we are going to base on your set up, what start speculating???

How can you even base that?

I clearly said I passed the O2 sensor. So my cat is not the issue. I even posted the picture of the results

[C230AMG]

Originally Posted by hz_diesel

How can you even base that?

I clearly said I passed the O2 sensor. So my cat is not the issue. I even posted the picture of the results

You don't get it, the O2 sensors passed means they are functioning correctly reading the cat not properly doing its job.

[hz_diesel]

Originally Posted by C230AMG

You don't get it, the O2 sensors passed means they are functioning correctly reading the cat not properly doing its job.

I passed with the hi flow cat still on the second time around, so keep preaching.

[C230AMG]

Originally Posted by hz_diesel

I passed with the hi flow cat still on the second time around, so keep preaching.

Who's preaching? FYI, this forum is only to assist not knock on anyone. If you remember the terms of using these blogs.

[dannyle27]

Colin,

I thought the Cobb suppresses the O2 monitors, so they could have flagged you automatically since you left your Cobb married. Better option would have been to remove/untune the cobb completely and drive the full cycle. I passed with jb4 off, cobb unmarried, no cat and the o2 catsim lol