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2 part question
i have a 93 civic lx (engine = D15B7) that was not manufactured with
an EGR valve, which is weird to me cause i thought all modern vehicles had one (since the late 70's). I failed california smog 4 times with twice the legal limits of NOX but everything else was fine, i'm assuming the catalytic converter is the only thing that fixes this right, as it is likely a 3-way cat? also does anyone know is using a PCV catch can (oil catch can) is smog legal in california? i know they are sticklers when it comes to anything emissions related, as most things need to have a CARB approved # stamped on them, but since the catch can only catches the oil and does not stop the air from recirculating and burning up as intended i dont see why it would be illegal, lowers emissions right? i know high nox is due to high combustion chamber temps, besides de-carbonizing the piston tops what else would lower nox on a non egr vehicle? |
Re: 2 part question
vairox <nothere@spammasters.com> wrote in
news:81cl429vgo5ejvaen1sd9dcegi3imdgaa1@4ax.com: > i have a 93 civic lx (engine = D15B7) that was not manufactured with > an EGR valve, which is weird to me cause i thought all modern > vehicles had one (since the late 70's). I failed california smog 4 > times with twice the legal limits of NOX but everything else was fine, > i'm assuming the catalytic converter is the only thing that fixes this > right, as it is likely a 3-way cat? maybe a bad O2 sensor? any codes set on the ECU? > > also does anyone know is using a PCV catch can (oil catch can) is smog > legal in california? i know they are sticklers when it comes to > anything emissions related, as most things need to have a CARB > approved # stamped on them, but since the catch can only catches the > oil and does not stop the air from recirculating and burning up as > intended i dont see why it would be illegal, lowers emissions right? > > i know high nox is due to high combustion chamber temps, besides > de-carbonizing the piston tops what else would lower nox on a non egr > vehicle? > -- Jim Yanik jyanik at kua.net |
Re: 2 part question
vairox <nothere@spammasters.com> wrote in
news:81cl429vgo5ejvaen1sd9dcegi3imdgaa1@4ax.com: > i have a 93 civic lx (engine = D15B7) that was not manufactured with > an EGR valve, which is weird to me cause i thought all modern > vehicles had one (since the late 70's). I failed california smog 4 > times with twice the legal limits of NOX but everything else was fine, > i'm assuming the catalytic converter is the only thing that fixes this > right, as it is likely a 3-way cat? maybe a bad O2 sensor? any codes set on the ECU? > > also does anyone know is using a PCV catch can (oil catch can) is smog > legal in california? i know they are sticklers when it comes to > anything emissions related, as most things need to have a CARB > approved # stamped on them, but since the catch can only catches the > oil and does not stop the air from recirculating and burning up as > intended i dont see why it would be illegal, lowers emissions right? > > i know high nox is due to high combustion chamber temps, besides > de-carbonizing the piston tops what else would lower nox on a non egr > vehicle? > -- Jim Yanik jyanik at kua.net |
Re: 2 part question
vairox <nothere@spammasters.com> wrote in
news:81cl429vgo5ejvaen1sd9dcegi3imdgaa1@4ax.com: > i have a 93 civic lx (engine = D15B7) that was not manufactured with > an EGR valve, which is weird to me cause i thought all modern > vehicles had one (since the late 70's). I failed california smog 4 > times with twice the legal limits of NOX but everything else was fine, > i'm assuming the catalytic converter is the only thing that fixes this > right, as it is likely a 3-way cat? maybe a bad O2 sensor? any codes set on the ECU? > > also does anyone know is using a PCV catch can (oil catch can) is smog > legal in california? i know they are sticklers when it comes to > anything emissions related, as most things need to have a CARB > approved # stamped on them, but since the catch can only catches the > oil and does not stop the air from recirculating and burning up as > intended i dont see why it would be illegal, lowers emissions right? > > i know high nox is due to high combustion chamber temps, besides > de-carbonizing the piston tops what else would lower nox on a non egr > vehicle? > -- Jim Yanik jyanik at kua.net |
Re: 2 part question
"vairox" <nothere@spammasters.com> wrote in message
news:81cl429vgo5ejvaen1sd9dcegi3imdgaa1@4ax.com... >i have a 93 civic lx (engine = D15B7) that was not manufactured with > an EGR valve, which is weird to me cause i thought all modern > vehicles had one (since the late 70's). I failed california smog 4 > times with twice the legal limits of NOX but everything else was fine, > i'm assuming the catalytic converter is the only thing that fixes this > right, as it is likely a 3-way cat? > > also does anyone know is using a PCV catch can (oil catch can) is smog > legal in california? i know they are sticklers when it comes to > anything emissions related, as most things need to have a CARB > approved # stamped on them, but since the catch can only catches the > oil and does not stop the air from recirculating and burning up as > intended i dont see why it would be illegal, lowers emissions right? > > i know high nox is due to high combustion chamber temps, besides > de-carbonizing the piston tops what else would lower nox on a non egr > vehicle? That's about the size of it - the NOx stage of the cat is bad... assuming it is a 3-stage cat. The absence of EGR makes me think that is so. Make sure the timing is correct. Advanced timing will raise the NOx level, but AFAIK a 3-stage catalytic converter hides that as long as it is working. Mike |
Re: 2 part question
"vairox" <nothere@spammasters.com> wrote in message
news:81cl429vgo5ejvaen1sd9dcegi3imdgaa1@4ax.com... >i have a 93 civic lx (engine = D15B7) that was not manufactured with > an EGR valve, which is weird to me cause i thought all modern > vehicles had one (since the late 70's). I failed california smog 4 > times with twice the legal limits of NOX but everything else was fine, > i'm assuming the catalytic converter is the only thing that fixes this > right, as it is likely a 3-way cat? > > also does anyone know is using a PCV catch can (oil catch can) is smog > legal in california? i know they are sticklers when it comes to > anything emissions related, as most things need to have a CARB > approved # stamped on them, but since the catch can only catches the > oil and does not stop the air from recirculating and burning up as > intended i dont see why it would be illegal, lowers emissions right? > > i know high nox is due to high combustion chamber temps, besides > de-carbonizing the piston tops what else would lower nox on a non egr > vehicle? That's about the size of it - the NOx stage of the cat is bad... assuming it is a 3-stage cat. The absence of EGR makes me think that is so. Make sure the timing is correct. Advanced timing will raise the NOx level, but AFAIK a 3-stage catalytic converter hides that as long as it is working. Mike |
Re: 2 part question
"vairox" <nothere@spammasters.com> wrote in message
news:81cl429vgo5ejvaen1sd9dcegi3imdgaa1@4ax.com... >i have a 93 civic lx (engine = D15B7) that was not manufactured with > an EGR valve, which is weird to me cause i thought all modern > vehicles had one (since the late 70's). I failed california smog 4 > times with twice the legal limits of NOX but everything else was fine, > i'm assuming the catalytic converter is the only thing that fixes this > right, as it is likely a 3-way cat? > > also does anyone know is using a PCV catch can (oil catch can) is smog > legal in california? i know they are sticklers when it comes to > anything emissions related, as most things need to have a CARB > approved # stamped on them, but since the catch can only catches the > oil and does not stop the air from recirculating and burning up as > intended i dont see why it would be illegal, lowers emissions right? > > i know high nox is due to high combustion chamber temps, besides > de-carbonizing the piston tops what else would lower nox on a non egr > vehicle? That's about the size of it - the NOx stage of the cat is bad... assuming it is a 3-stage cat. The absence of EGR makes me think that is so. Make sure the timing is correct. Advanced timing will raise the NOx level, but AFAIK a 3-stage catalytic converter hides that as long as it is working. Mike |
Re: 2 part question
thanks guys... the O2 sensor was replaced by a shop the last time it
failed (in july 04) and it failed with harder NOX and a higher amount of HC, though it was still in the legal limit.... no ECU codes... might install a magnaflow direct fit replacement, if i can get them to confirm it is california smog/noise legal... sort of stumped cause i have another inspection coming up in june or july.... i am now using the proper OEM NGK plugs, did some intake cleaner throught the booster, idles much better, drives smoother... cleaned a lot of carbon off the pistons. you guys know what effect a PCV catch can would have on emissions? i know it wouldnt do squat on NOX, thats temp related....but any others? |
Re: 2 part question
thanks guys... the O2 sensor was replaced by a shop the last time it
failed (in july 04) and it failed with harder NOX and a higher amount of HC, though it was still in the legal limit.... no ECU codes... might install a magnaflow direct fit replacement, if i can get them to confirm it is california smog/noise legal... sort of stumped cause i have another inspection coming up in june or july.... i am now using the proper OEM NGK plugs, did some intake cleaner throught the booster, idles much better, drives smoother... cleaned a lot of carbon off the pistons. you guys know what effect a PCV catch can would have on emissions? i know it wouldnt do squat on NOX, thats temp related....but any others? |
Re: 2 part question
thanks guys... the O2 sensor was replaced by a shop the last time it
failed (in july 04) and it failed with harder NOX and a higher amount of HC, though it was still in the legal limit.... no ECU codes... might install a magnaflow direct fit replacement, if i can get them to confirm it is california smog/noise legal... sort of stumped cause i have another inspection coming up in june or july.... i am now using the proper OEM NGK plugs, did some intake cleaner throught the booster, idles much better, drives smoother... cleaned a lot of carbon off the pistons. you guys know what effect a PCV catch can would have on emissions? i know it wouldnt do squat on NOX, thats temp related....but any others? |
Re: 2 part question
You're correct: A 93 Civic LX does not have an EGR system,
according to my Chilton's. This seems like a helpful site: http://www.aircare.ca/index.php?repinfo-glossary.php . See especially "Causes of Excess Emissions." It puts a lot of emphasis on an improperly functioning EGR system causing high NOx , but it lists a few other causes, too. None are the PCV valve. http://www.interro.com/techgas.html#anchoreleven states similar. An improperly functioning PCV valve may cause high CO, which you don't have. What is a PCV valve "catch can"? Did you remove the PCV valve? "vairox" <nothere@spammasters.com> wrote > thanks guys... the O2 sensor was replaced by a shop the > last time it > failed (in july 04) and it failed with harder NOX and a > higher amount > of HC, though it was still in the legal limit.... > > no ECU codes... > > might install a magnaflow direct fit replacement, if i can > get them to > confirm it is california smog/noise legal... > > sort of stumped cause i have another inspection coming up > in june or > july.... i am now using the proper OEM NGK plugs, did some > intake > cleaner throught the booster, idles much better, drives > smoother... > cleaned a lot of carbon off the pistons. > > you guys know what effect a PCV catch can would have on > emissions? i > know it wouldnt do squat on NOX, thats temp related....but > any others? > > |
Re: 2 part question
You're correct: A 93 Civic LX does not have an EGR system,
according to my Chilton's. This seems like a helpful site: http://www.aircare.ca/index.php?repinfo-glossary.php . See especially "Causes of Excess Emissions." It puts a lot of emphasis on an improperly functioning EGR system causing high NOx , but it lists a few other causes, too. None are the PCV valve. http://www.interro.com/techgas.html#anchoreleven states similar. An improperly functioning PCV valve may cause high CO, which you don't have. What is a PCV valve "catch can"? Did you remove the PCV valve? "vairox" <nothere@spammasters.com> wrote > thanks guys... the O2 sensor was replaced by a shop the > last time it > failed (in july 04) and it failed with harder NOX and a > higher amount > of HC, though it was still in the legal limit.... > > no ECU codes... > > might install a magnaflow direct fit replacement, if i can > get them to > confirm it is california smog/noise legal... > > sort of stumped cause i have another inspection coming up > in june or > july.... i am now using the proper OEM NGK plugs, did some > intake > cleaner throught the booster, idles much better, drives > smoother... > cleaned a lot of carbon off the pistons. > > you guys know what effect a PCV catch can would have on > emissions? i > know it wouldnt do squat on NOX, thats temp related....but > any others? > > |
Re: 2 part question
You're correct: A 93 Civic LX does not have an EGR system,
according to my Chilton's. This seems like a helpful site: http://www.aircare.ca/index.php?repinfo-glossary.php . See especially "Causes of Excess Emissions." It puts a lot of emphasis on an improperly functioning EGR system causing high NOx , but it lists a few other causes, too. None are the PCV valve. http://www.interro.com/techgas.html#anchoreleven states similar. An improperly functioning PCV valve may cause high CO, which you don't have. What is a PCV valve "catch can"? Did you remove the PCV valve? "vairox" <nothere@spammasters.com> wrote > thanks guys... the O2 sensor was replaced by a shop the > last time it > failed (in july 04) and it failed with harder NOX and a > higher amount > of HC, though it was still in the legal limit.... > > no ECU codes... > > might install a magnaflow direct fit replacement, if i can > get them to > confirm it is california smog/noise legal... > > sort of stumped cause i have another inspection coming up > in june or > july.... i am now using the proper OEM NGK plugs, did some > intake > cleaner throught the booster, idles much better, drives > smoother... > cleaned a lot of carbon off the pistons. > > you guys know what effect a PCV catch can would have on > emissions? i > know it wouldnt do squat on NOX, thats temp related....but > any others? > > |
Re: 2 part question
On Sun, 23 Apr 2006 13:33:47 GMT, "Elle"
<honda.lioness@nospam.earthlink.net> wrote: >You're correct: A 93 Civic LX does not have an EGR system, >according to my Chilton's. > >This seems like a helpful site: >http://www.aircare.ca/index.php?repinfo-glossary.php . See >especially >"Causes of Excess Emissions." > >It puts a lot of emphasis on an improperly functioning EGR >system causing >high NOx , but it lists a few other causes, too. None are >the PCV valve. > >http://www.interro.com/techgas.html#anchoreleven states >similar. > >An improperly functioning PCV valve may cause high CO, which >you don't have. > >What is a PCV valve "catch can"? Did you remove the PCV >valve? > >"vairox" <nothere@spammasters.com> wrote >> thanks guys... the O2 sensor was replaced by a shop the >> last time it >> failed (in july 04) and it failed with harder NOX and a >> higher amount >> of HC, though it was still in the legal limit.... >> >> no ECU codes... >> >> might install a magnaflow direct fit replacement, if i can >> get them to >> confirm it is california smog/noise legal... >> >> sort of stumped cause i have another inspection coming up >> in june or >> july.... i am now using the proper OEM NGK plugs, did some >> intake >> cleaner throught the booster, idles much better, drives >> smoother... >> cleaned a lot of carbon off the pistons. >> >> you guys know what effect a PCV catch can would have on >> emissions? i >> know it wouldnt do squat on NOX, thats temp related....but >> any others? >> >> > thanks for checking the chiltons, i only have a haynes and it's not very specific about that... PCV catch can is just a can more or less, you take the hose that comes off the PCV valve and it connects to a can, then another hose goes from the other side of the can and goes back to where the PCV hose originally went, it just sits in-line of the PCV hose to catch all the oil blowby so it doesnt gum up the intake/valves etc... still allows the gasses to go by and get burned up... what are the other causes of high nox? high combustion chamber temps due to carbon buildup is one but im not sure of any others |
Re: 2 part question
On Sun, 23 Apr 2006 13:33:47 GMT, "Elle"
<honda.lioness@nospam.earthlink.net> wrote: >You're correct: A 93 Civic LX does not have an EGR system, >according to my Chilton's. > >This seems like a helpful site: >http://www.aircare.ca/index.php?repinfo-glossary.php . See >especially >"Causes of Excess Emissions." > >It puts a lot of emphasis on an improperly functioning EGR >system causing >high NOx , but it lists a few other causes, too. None are >the PCV valve. > >http://www.interro.com/techgas.html#anchoreleven states >similar. > >An improperly functioning PCV valve may cause high CO, which >you don't have. > >What is a PCV valve "catch can"? Did you remove the PCV >valve? > >"vairox" <nothere@spammasters.com> wrote >> thanks guys... the O2 sensor was replaced by a shop the >> last time it >> failed (in july 04) and it failed with harder NOX and a >> higher amount >> of HC, though it was still in the legal limit.... >> >> no ECU codes... >> >> might install a magnaflow direct fit replacement, if i can >> get them to >> confirm it is california smog/noise legal... >> >> sort of stumped cause i have another inspection coming up >> in june or >> july.... i am now using the proper OEM NGK plugs, did some >> intake >> cleaner throught the booster, idles much better, drives >> smoother... >> cleaned a lot of carbon off the pistons. >> >> you guys know what effect a PCV catch can would have on >> emissions? i >> know it wouldnt do squat on NOX, thats temp related....but >> any others? >> >> > thanks for checking the chiltons, i only have a haynes and it's not very specific about that... PCV catch can is just a can more or less, you take the hose that comes off the PCV valve and it connects to a can, then another hose goes from the other side of the can and goes back to where the PCV hose originally went, it just sits in-line of the PCV hose to catch all the oil blowby so it doesnt gum up the intake/valves etc... still allows the gasses to go by and get burned up... what are the other causes of high nox? high combustion chamber temps due to carbon buildup is one but im not sure of any others |
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