My brothers '88 CVPI had to go through emissions today and it failed. Legal HC was 86 ppm, it put out 686 ppm. So it failed really bad on that account, although the CO and NOx emissions were very low.
The car has hollowed cats, and we swapped on stock mufflers and tails (it previosuly had no tails, which is a no no). The car was running on methanol too. The methanol has been laying around for two years, and from what I've read, the shelf life is between 6 months and two years.
The thing is, I'm not entirely convinced the reason it failed was because of the lack of cats. The car opretty much runs like crap at an idle (very rough). There are no vacuum leaks, and my dad says the timing is right. He has checked it several times.
We have never had something fail while running on alcohol. This being the first time I am thinking it is because the methanol was no good.
We have ordered two new cats for the car.
I guess what I want to know is this:
1.) Did it fail because of a lack of cats, or a poor running condition (running alcohol without necessary timing/ mixture adjustment; as well as the fact that it doesn't even run well on gasoline)
2.) What are other possible causes of a high HC count? I understand the cats are where unburned fuel is supposed to be burned up, but is there anything else that could lead to a high HC count? It does not seem like the car runs rich.
3.) If the car is running rich, how can that be adjusted via the VV 7200?
4.) Any thoughts you have on the situation, and emissions tricks, etc in general.
Thanks guys
Nathan
The car has hollowed cats, and we swapped on stock mufflers and tails (it previosuly had no tails, which is a no no). The car was running on methanol too. The methanol has been laying around for two years, and from what I've read, the shelf life is between 6 months and two years.
The thing is, I'm not entirely convinced the reason it failed was because of the lack of cats. The car opretty much runs like crap at an idle (very rough). There are no vacuum leaks, and my dad says the timing is right. He has checked it several times.
We have never had something fail while running on alcohol. This being the first time I am thinking it is because the methanol was no good.
We have ordered two new cats for the car.
I guess what I want to know is this:
1.) Did it fail because of a lack of cats, or a poor running condition (running alcohol without necessary timing/ mixture adjustment; as well as the fact that it doesn't even run well on gasoline)
2.) What are other possible causes of a high HC count? I understand the cats are where unburned fuel is supposed to be burned up, but is there anything else that could lead to a high HC count? It does not seem like the car runs rich.
3.) If the car is running rich, how can that be adjusted via the VV 7200?
4.) Any thoughts you have on the situation, and emissions tricks, etc in general.
Thanks guys
Nathan
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