Failed CT emissions. Have results, help please!
06-17-2010, 12:39 PM
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Failed CT emissions. Have results, help please!
I just came back from the testing facility, and my car failed...quite miserably.
But first a little background... I just changed the plugs and the oil, and air filter. 2 days ago, i filled up w/ premium gas and used some fuel injector cleaner. This morning before the test (per the recommendation of the guy at NAPA) I took the car for a spirited drive on a deserted highway at high speeds to "blow all the sh*t out of it" (NAPA guy's words) and to get the car HOT HOT HOT. Then I went to have the test done.
Here's the results:
HC (PPM):
Limit: 100 Me: 267 = FAIL
CO (%):
Limit 0.32% Me: 4.10% = Ouch! FAIL
NOx (PPM):
Limit: 700 Me: 265 = Yay...Pass
That's it. So now I need help in fixing it...I've got 2 months to get it retested. I guess I should note that I bought this car a few months ago with out an air pump installed. I think the cats may be original. Don't know. But here's some pics of them and the metal hose thing coming off the cat that goes nowhere...i guess it used to go to the airpump.
If anyone can give me tips on getting the car to pass emissions, i'm all ears.
But first a little background... I just changed the plugs and the oil, and air filter. 2 days ago, i filled up w/ premium gas and used some fuel injector cleaner. This morning before the test (per the recommendation of the guy at NAPA) I took the car for a spirited drive on a deserted highway at high speeds to "blow all the sh*t out of it" (NAPA guy's words) and to get the car HOT HOT HOT. Then I went to have the test done.
Here's the results:
HC (PPM):
Limit: 100 Me: 267 = FAIL
CO (%):
Limit 0.32% Me: 4.10% = Ouch! FAIL
NOx (PPM):
Limit: 700 Me: 265 = Yay...Pass
That's it. So now I need help in fixing it...I've got 2 months to get it retested. I guess I should note that I bought this car a few months ago with out an air pump installed. I think the cats may be original. Don't know. But here's some pics of them and the metal hose thing coming off the cat that goes nowhere...i guess it used to go to the airpump.
If anyone can give me tips on getting the car to pass emissions, i'm all ears.
06-17-2010, 01:03 PM
#3
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If that pipe causes an airleak into the exhaust ahead of the O2 sensor, that will throw your CO off as the O2 loop senses the mixture as too weak.
You should be able to cut off and seal that pipe, you don't need an airpump connection to meet emissions.
You should be able to cut off and seal that pipe, you don't need an airpump connection to meet emissions.
06-17-2010, 01:10 PM
#5
I know some have found fasteners that fit over the tube, mine is just bent over and sealed.
06-17-2010, 01:13 PM
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how can i test my O2 sensor, and what should I be on the look out for?
that's what the emissions guy told me... the failure was due to "unburnt fuel" or running rich, like you said.
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06-17-2010, 01:17 PM
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OK, I'll seal that pipe. Do you know what color that vacuum line is? Where did it originally go? So it should be in the same area as where that disconnected pipe is?
06-17-2010, 01:25 PM
#10
I believe it comes from the 5-way splitter under the air box and is white in color. It would terminate near the expansion tank/washer fluid tank. I can't see it in your pic so my guess it has been cut or rerouted. I would think if it is not closed you would have a vacuum leak.
While your in there check that your fuel regulator and dampners vacuum lines do not have fuel in them as this would also cause ruch running.
While your in there check that your fuel regulator and dampners vacuum lines do not have fuel in them as this would also cause ruch running.
06-17-2010, 01:43 PM
#12
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Parroting the above posters:
- It's fat as a pig, right? Too much C and too little O gives CO instead of (desired) CO2.
- Plug the air pipe if it's not plugged. Then see if you can get the mixture right.
- If all else fails, reinstall the air pump. Since the cat is old two way, it may need more O to turn CO into CO2.
- It's fat as a pig, right? Too much C and too little O gives CO instead of (desired) CO2.
- Plug the air pipe if it's not plugged. Then see if you can get the mixture right.
- If all else fails, reinstall the air pump. Since the cat is old two way, it may need more O to turn CO into CO2.
06-17-2010, 01:49 PM
#13
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My advice to the OP is to have the O2 sensor replaced if he has no record of it ever being done.
06-17-2010, 01:52 PM
#14
Nordschleife Master
Don't know jack **** about this, I thought before reading this that the diverter valve worked in a way that that the manifold vacuum/pressure opened the valve and sent the air to cats or airbox. Interesting that it's somehow linked to the temperature as well.
Last edited by ptuomov; 06-17-2010 at 02:24 PM.
06-17-2010, 02:57 PM
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UPDATE:
That pipe to the CAT (from the no longer existing air pump) is in fact capped. I just checked it and it has a cap screwed on to it.
This is a little discouraging since I was hoping that capping that pipe would be a quick fix. So here's what I'm left with at this point:
1. Replace the oxygen sensor
2. Check and make sure there's no vacuum leaks.
Is that about it?
This is a little discouraging since I was hoping that capping that pipe would be a quick fix. So here's what I'm left with at this point:
1. Replace the oxygen sensor
2. Check and make sure there's no vacuum leaks.
Is that about it?