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post #1 of 20 Old 08-10-2011, 04:43 PM Thread Starter
Matt24138
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Emissions

I am trying to get a better understanding of emissions and proper levels and what you can determine on how your engine performance is by the levels. I have scowered the net not finding much but general info. Does anyone have a link to site or a way to explain? I finally passed emissions today with my co levels going from 1.35 to .52 but would like to know how good that lvl is and what it means.

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post #2 of 20 Old 08-10-2011, 09:33 PM
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Originally Posted by Matt24138 View Post
I am trying to get a better understanding of emissions and proper levels and what you can determine on how your engine performance is by the levels. I have scowered the net not finding much but general info. Does anyone have a link to site or a way to explain? I finally passed emissions today with my co levels going from 1.35 to .52 but would like to know how good that lvl is and what it means.
The emissions system manages the air/fuel/timing of an engine. Using sensors it adjust the levels of fuel to air required according to the inputss from those sensors. It also alters timing to attempt to keep the engine running well using the least amount of fuel possible. The cat converter scrubs the exhaust to aid in keeping the envorinment cleaner.

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
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post #3 of 20 Old 08-11-2011, 07:00 AM Thread Starter
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I understand the basics of the systems. I am trying to find something that gives me comparative numbers for nox and co levels. I have been to the EPA website but no numbers just basic info.
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post #4 of 20 Old 08-11-2011, 07:20 AM
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I don't have the papers handy, but I once made a 1970 Chevy big-block pass the same numbers as an injected V-6. Trick is to know how to tune those old beasts, and understand that with late-model EFI it stays tuned - you don't have to constantly fiddle with it. IIRC the numbers were similar to yours.
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post #5 of 20 Old 08-11-2011, 08:25 AM
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I understand the basics of the systems. I am trying to find something that gives me comparative numbers for nox and co levels. I have been to the EPA website but no numbers just basic info.
It seems that the only way to find out what those numbers are is to get the car inspected. It tells you what the limits are and how your engine did. I have done some research also and found nothing.

There is no way there is only one set of emissions standards for every engine made. I do believe that the estimated MPG for your vehicle/engine combination is the key to how much pollution your car can emit. That is where some ‘creativity’ seems to rear its ugly little head.

In addition most states do not allow older engines to be swapped into newer vehicles. Hell there may be some states that do not allow any engine changes other than what a particular vehicle left the factory with.

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
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post #6 of 20 Old 08-11-2011, 10:39 AM Thread Starter
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My co level was 0.52 I am trying to determine how good that level is.
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post #7 of 20 Old 08-11-2011, 12:02 PM
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My co level was 0.52 I am trying to determine how good that level is.
Don't they give you a printout of the emission test that your car went through? Here is Mass. we receive a printout of the test and it notes the acceptable range for each test and then what number your engine 'blew' for each test.

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
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post #8 of 20 Old 08-11-2011, 12:05 PM
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Yeah there should have been a print out they gave you that shows what acceptable levels are..

All about that unibody life.
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post #9 of 20 Old 08-11-2011, 12:08 PM Thread Starter
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I am way under the 1.20. I am just curious if that is as good as say a 2009 vehicle. They no longer give you the print out unless you fail I had to ask.
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post #10 of 20 Old 08-11-2011, 12:27 PM
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I am way under the 1.20. I am just curious if that is as good as say a 2009 vehicle. They no longer give you the print out unless you fail I had to ask.
My guess would be that a much bigger engine could match the cleanliness of your older engine since they periodically demand that any given engine run cleaner than a like sized older engine by increasing the MPG the newer engine must achieve.

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
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post #11 of 20 Old 08-11-2011, 12:40 PM Thread Starter
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I am sure it could match it. I am just trying to get a feel for how well my yj is performing and the level if maintenance I have put in it. So I am trying to find comparative numbers.
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post #12 of 20 Old 08-11-2011, 12:54 PM
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I am sure it could match it. I am just trying to get a feel for how well my yj is performing and the level if maintenance I have put in it. So I am trying to find comparative numbers.
Put up an ad in your local craigslist in the automotive section looking for a copy of someone's fail notice. Just make sure they have the same year vehicle with the same engine.

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
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post #13 of 20 Old 08-11-2011, 02:40 PM
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Ask them for the printout if they don't give you one. I get one whether or not I pass.

Also, with all this talk of making cleaner vehicles, you'd think that newer vehicles put out less emissions than newer vehicles..

All about that unibody life.
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post #14 of 20 Old 08-11-2011, 03:34 PM Thread Starter
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They wouldn't give it to me. He didn't even want to tell me the numbers. Delaware is a little different we have to be inspected at motor vehicle. Not a garage or gas station so if you pass they won't give it to you I guess it's a cost thing. They will give you one if you fail to take to a shop.
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post #15 of 20 Old 08-11-2011, 04:38 PM
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That's weird. Maybe it was the shop you took it to? Here in CA we need to go to an approved shop in order to get smog paperwork...

All about that unibody life.
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