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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
In article <kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com>, vairox
<nothere@spammasters.com> wrote: > 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 I can only guess: defective rings defective muffler defective cat. coverter valves not adjusted correctly timing set incorrectly defective plugs or plugs not gapped correctly If you hook the engine up to a computerized engine tester--it should discover the source of the problem. I show a recent post where someone replaced all of the parts of his engine that might have caused his engine to stall on a regular basis. It makes more sense to use testing equipment to discover the exact cause of a problem instead of replacing a bunch of parts that are working great. Jason -- NEWSGROUP SUBSCRIBERS MOTTO We respect those subscribers that ask for advice or provide advice. We do NOT respect the subscribers that enjoy criticizing people. |
Re: 2 part question
In article <kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com>, vairox
<nothere@spammasters.com> wrote: > 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 I can only guess: defective rings defective muffler defective cat. coverter valves not adjusted correctly timing set incorrectly defective plugs or plugs not gapped correctly If you hook the engine up to a computerized engine tester--it should discover the source of the problem. I show a recent post where someone replaced all of the parts of his engine that might have caused his engine to stall on a regular basis. It makes more sense to use testing equipment to discover the exact cause of a problem instead of replacing a bunch of parts that are working great. Jason -- NEWSGROUP SUBSCRIBERS MOTTO We respect those subscribers that ask for advice or provide advice. We do NOT respect the subscribers that enjoy criticizing people. |
Re: 2 part question
In article <kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com>, vairox
<nothere@spammasters.com> wrote: > 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 I can only guess: defective rings defective muffler defective cat. coverter valves not adjusted correctly timing set incorrectly defective plugs or plugs not gapped correctly If you hook the engine up to a computerized engine tester--it should discover the source of the problem. I show a recent post where someone replaced all of the parts of his engine that might have caused his engine to stall on a regular basis. It makes more sense to use testing equipment to discover the exact cause of a problem instead of replacing a bunch of parts that are working great. Jason -- NEWSGROUP SUBSCRIBERS MOTTO We respect those subscribers that ask for advice or provide advice. We do NOT respect the subscribers that enjoy criticizing people. |
Re: 2 part question
"vairox" <nothere@spammasters.com> wrote in message
news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... > On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" > <honda.lioness@nospam.earthlink.net> wrote: > > > 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 > Technically, the causes are high temperatures and rapid cooling, which causes the NOx to "freeze" instead of decaying as the gases cooled. Since the expansion time is pretty much determined by engine speed, that leaves combustion temperature as the factor we can control. Carbon really isn't an issue directly, but it can cause preignition which has the same effect as advanced ignition timing. The two big culprits are ignition timing and mixture. Advanced timing increases combustion temperatures, and a leaner mixture at high throttle settings (when it should be rich anyway to forestall detonation) does the same. EGR reduces the temperature by diluting the mixture without affecting the air/fuel ratio. Mike |
Re: 2 part question
"vairox" <nothere@spammasters.com> wrote in message
news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... > On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" > <honda.lioness@nospam.earthlink.net> wrote: > > > 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 > Technically, the causes are high temperatures and rapid cooling, which causes the NOx to "freeze" instead of decaying as the gases cooled. Since the expansion time is pretty much determined by engine speed, that leaves combustion temperature as the factor we can control. Carbon really isn't an issue directly, but it can cause preignition which has the same effect as advanced ignition timing. The two big culprits are ignition timing and mixture. Advanced timing increases combustion temperatures, and a leaner mixture at high throttle settings (when it should be rich anyway to forestall detonation) does the same. EGR reduces the temperature by diluting the mixture without affecting the air/fuel ratio. Mike |
Re: 2 part question
"vairox" <nothere@spammasters.com> wrote in message
news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... > On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" > <honda.lioness@nospam.earthlink.net> wrote: > > > 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 > Technically, the causes are high temperatures and rapid cooling, which causes the NOx to "freeze" instead of decaying as the gases cooled. Since the expansion time is pretty much determined by engine speed, that leaves combustion temperature as the factor we can control. Carbon really isn't an issue directly, but it can cause preignition which has the same effect as advanced ignition timing. The two big culprits are ignition timing and mixture. Advanced timing increases combustion temperatures, and a leaner mixture at high throttle settings (when it should be rich anyway to forestall detonation) does the same. EGR reduces the temperature by diluting the mixture without affecting the air/fuel ratio. Mike |
Re: 2 part question
Michael Pardee wrote:
> "vairox" <nothere@spammasters.com> wrote in message > news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... > >>On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" >><honda.lioness@nospam.earthlink.net> wrote: >> >> >>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 >> > > Technically, the causes are high temperatures and rapid cooling, which > causes the NOx to "freeze" instead of decaying as the gases cooled. > > Since the expansion time is pretty much determined by engine speed, that > leaves combustion temperature as the factor we can control. Carbon really > isn't an issue directly, but it can cause preignition which has the same > effect as advanced ignition timing. The two big culprits are ignition timing > and mixture. Advanced timing increases combustion temperatures, and a leaner > mixture at high throttle settings (when it should be rich anyway to > forestall detonation) does the same. EGR reduces the temperature by diluting > the mixture without affecting the air/fuel ratio. > > Mike > > good post. yes, check timing and mixture. mixture can be assisted by running a couple of tanks with injector cleaner through the vehicle. timing should be set with the maintenance jumper connected. and it should be dead-on, not just close. regarding egr, it's often addressed these days by increasing the overlap between exhaust and inlet valve timing, so make sure the valve clearances are correct. to the op, no, an oil catch can is illegal in california. |
Re: 2 part question
Michael Pardee wrote:
> "vairox" <nothere@spammasters.com> wrote in message > news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... > >>On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" >><honda.lioness@nospam.earthlink.net> wrote: >> >> >>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 >> > > Technically, the causes are high temperatures and rapid cooling, which > causes the NOx to "freeze" instead of decaying as the gases cooled. > > Since the expansion time is pretty much determined by engine speed, that > leaves combustion temperature as the factor we can control. Carbon really > isn't an issue directly, but it can cause preignition which has the same > effect as advanced ignition timing. The two big culprits are ignition timing > and mixture. Advanced timing increases combustion temperatures, and a leaner > mixture at high throttle settings (when it should be rich anyway to > forestall detonation) does the same. EGR reduces the temperature by diluting > the mixture without affecting the air/fuel ratio. > > Mike > > good post. yes, check timing and mixture. mixture can be assisted by running a couple of tanks with injector cleaner through the vehicle. timing should be set with the maintenance jumper connected. and it should be dead-on, not just close. regarding egr, it's often addressed these days by increasing the overlap between exhaust and inlet valve timing, so make sure the valve clearances are correct. to the op, no, an oil catch can is illegal in california. |
Re: 2 part question
Michael Pardee wrote:
> "vairox" <nothere@spammasters.com> wrote in message > news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... > >>On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" >><honda.lioness@nospam.earthlink.net> wrote: >> >> >>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 >> > > Technically, the causes are high temperatures and rapid cooling, which > causes the NOx to "freeze" instead of decaying as the gases cooled. > > Since the expansion time is pretty much determined by engine speed, that > leaves combustion temperature as the factor we can control. Carbon really > isn't an issue directly, but it can cause preignition which has the same > effect as advanced ignition timing. The two big culprits are ignition timing > and mixture. Advanced timing increases combustion temperatures, and a leaner > mixture at high throttle settings (when it should be rich anyway to > forestall detonation) does the same. EGR reduces the temperature by diluting > the mixture without affecting the air/fuel ratio. > > Mike > > good post. yes, check timing and mixture. mixture can be assisted by running a couple of tanks with injector cleaner through the vehicle. timing should be set with the maintenance jumper connected. and it should be dead-on, not just close. regarding egr, it's often addressed these days by increasing the overlap between exhaust and inlet valve timing, so make sure the valve clearances are correct. to the op, no, an oil catch can is illegal in california. |
Re: 2 part question
On Sun, 23 Apr 2006 13:26:43 -0700, jim beam <nospam@example.net>
wrote: >Michael Pardee wrote: >> "vairox" <nothere@spammasters.com> wrote in message >> news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... >> >>>On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" >>><honda.lioness@nospam.earthlink.net> wrote: >>> >>> >>>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 >>> >> >> Technically, the causes are high temperatures and rapid cooling, which >> causes the NOx to "freeze" instead of decaying as the gases cooled. >> >> Since the expansion time is pretty much determined by engine speed, that >> leaves combustion temperature as the factor we can control. Carbon really >> isn't an issue directly, but it can cause preignition which has the same >> effect as advanced ignition timing. The two big culprits are ignition timing >> and mixture. Advanced timing increases combustion temperatures, and a leaner >> mixture at high throttle settings (when it should be rich anyway to >> forestall detonation) does the same. EGR reduces the temperature by diluting >> the mixture without affecting the air/fuel ratio. >> >> Mike >> >> > >good post. yes, check timing and mixture. mixture can be assisted by >running a couple of tanks with injector cleaner through the vehicle. >timing should be set with the maintenance jumper connected. and it >should be dead-on, not just close. regarding egr, it's often addressed >these days by increasing the overlap between exhaust and inlet valve >timing, so make sure the valve clearances are correct. > >to the op, no, an oil catch can is illegal in california. why is a catch can illegal? good advice guys, someone from another newsgroup claims that the car DOES use an EGR and said to go to http://www.smpcorp.com/web_app/catalog/publicweb_bg.asp then put in part # EGV551 i can see a mount near the valve cover where one WOULD go, but i think the only cars of this era that had one are the ex and vx ? may have to adjust the valves, it's pretty tough to get the timing dead on considering the rpm's go up when the fan kicks on to cool the engine, and finding 650rpm's EXACTLY on the tach is just a guess. |
Re: 2 part question
On Sun, 23 Apr 2006 13:26:43 -0700, jim beam <nospam@example.net>
wrote: >Michael Pardee wrote: >> "vairox" <nothere@spammasters.com> wrote in message >> news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... >> >>>On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" >>><honda.lioness@nospam.earthlink.net> wrote: >>> >>> >>>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 >>> >> >> Technically, the causes are high temperatures and rapid cooling, which >> causes the NOx to "freeze" instead of decaying as the gases cooled. >> >> Since the expansion time is pretty much determined by engine speed, that >> leaves combustion temperature as the factor we can control. Carbon really >> isn't an issue directly, but it can cause preignition which has the same >> effect as advanced ignition timing. The two big culprits are ignition timing >> and mixture. Advanced timing increases combustion temperatures, and a leaner >> mixture at high throttle settings (when it should be rich anyway to >> forestall detonation) does the same. EGR reduces the temperature by diluting >> the mixture without affecting the air/fuel ratio. >> >> Mike >> >> > >good post. yes, check timing and mixture. mixture can be assisted by >running a couple of tanks with injector cleaner through the vehicle. >timing should be set with the maintenance jumper connected. and it >should be dead-on, not just close. regarding egr, it's often addressed >these days by increasing the overlap between exhaust and inlet valve >timing, so make sure the valve clearances are correct. > >to the op, no, an oil catch can is illegal in california. why is a catch can illegal? good advice guys, someone from another newsgroup claims that the car DOES use an EGR and said to go to http://www.smpcorp.com/web_app/catalog/publicweb_bg.asp then put in part # EGV551 i can see a mount near the valve cover where one WOULD go, but i think the only cars of this era that had one are the ex and vx ? may have to adjust the valves, it's pretty tough to get the timing dead on considering the rpm's go up when the fan kicks on to cool the engine, and finding 650rpm's EXACTLY on the tach is just a guess. |
Re: 2 part question
On Sun, 23 Apr 2006 13:26:43 -0700, jim beam <nospam@example.net>
wrote: >Michael Pardee wrote: >> "vairox" <nothere@spammasters.com> wrote in message >> news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... >> >>>On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" >>><honda.lioness@nospam.earthlink.net> wrote: >>> >>> >>>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 >>> >> >> Technically, the causes are high temperatures and rapid cooling, which >> causes the NOx to "freeze" instead of decaying as the gases cooled. >> >> Since the expansion time is pretty much determined by engine speed, that >> leaves combustion temperature as the factor we can control. Carbon really >> isn't an issue directly, but it can cause preignition which has the same >> effect as advanced ignition timing. The two big culprits are ignition timing >> and mixture. Advanced timing increases combustion temperatures, and a leaner >> mixture at high throttle settings (when it should be rich anyway to >> forestall detonation) does the same. EGR reduces the temperature by diluting >> the mixture without affecting the air/fuel ratio. >> >> Mike >> >> > >good post. yes, check timing and mixture. mixture can be assisted by >running a couple of tanks with injector cleaner through the vehicle. >timing should be set with the maintenance jumper connected. and it >should be dead-on, not just close. regarding egr, it's often addressed >these days by increasing the overlap between exhaust and inlet valve >timing, so make sure the valve clearances are correct. > >to the op, no, an oil catch can is illegal in california. why is a catch can illegal? good advice guys, someone from another newsgroup claims that the car DOES use an EGR and said to go to http://www.smpcorp.com/web_app/catalog/publicweb_bg.asp then put in part # EGV551 i can see a mount near the valve cover where one WOULD go, but i think the only cars of this era that had one are the ex and vx ? may have to adjust the valves, it's pretty tough to get the timing dead on considering the rpm's go up when the fan kicks on to cool the engine, and finding 650rpm's EXACTLY on the tach is just a guess. |
Re: 2 part question
On Sun, 23 Apr 2006 17:52:04 -0700, vairox <nothere@spammasters.com>
wrote: >On Sun, 23 Apr 2006 13:26:43 -0700, jim beam <nospam@example.net> >wrote: > >>Michael Pardee wrote: >>> "vairox" <nothere@spammasters.com> wrote in message >>> news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... >>> >>>>On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" >>>><honda.lioness@nospam.earthlink.net> wrote: >>>> >>>> >>>>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 >>>> >>> >>> Technically, the causes are high temperatures and rapid cooling, which >>> causes the NOx to "freeze" instead of decaying as the gases cooled. >>> >>> Since the expansion time is pretty much determined by engine speed, that >>> leaves combustion temperature as the factor we can control. Carbon really >>> isn't an issue directly, but it can cause preignition which has the same >>> effect as advanced ignition timing. The two big culprits are ignition timing >>> and mixture. Advanced timing increases combustion temperatures, and a leaner >>> mixture at high throttle settings (when it should be rich anyway to >>> forestall detonation) does the same. EGR reduces the temperature by diluting >>> the mixture without affecting the air/fuel ratio. >>> >>> Mike >>> >>> >> >>good post. yes, check timing and mixture. mixture can be assisted by >>running a couple of tanks with injector cleaner through the vehicle. >>timing should be set with the maintenance jumper connected. and it >>should be dead-on, not just close. regarding egr, it's often addressed >>these days by increasing the overlap between exhaust and inlet valve >>timing, so make sure the valve clearances are correct. >> >>to the op, no, an oil catch can is illegal in california. > > >why is a catch can illegal? > >good advice guys, someone from another newsgroup claims that the car >DOES use an EGR and said to go to > >http://www.smpcorp.com/web_app/catalog/publicweb_bg.asp > >then put in part # EGV551 > > >i can see a mount near the valve cover where one WOULD go, but i think >the only cars of this era that had one are the ex and vx ? > >may have to adjust the valves, it's pretty tough to get the timing >dead on considering the rpm's go up when the fan kicks on to cool the >engine, and finding 650rpm's EXACTLY on the tach is just a guess. btw, rockauto.com is also coming up with the same product for the D15B7, and that mount area is on the backside of where the valve cover is, looks like where it would bolt on, only theres no opening into the engine there, or is there supposed to be? |
Re: 2 part question
On Sun, 23 Apr 2006 17:52:04 -0700, vairox <nothere@spammasters.com>
wrote: >On Sun, 23 Apr 2006 13:26:43 -0700, jim beam <nospam@example.net> >wrote: > >>Michael Pardee wrote: >>> "vairox" <nothere@spammasters.com> wrote in message >>> news:kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com... >>> >>>>On Sun, 23 Apr 2006 13:33:47 GMT, "Elle" >>>><honda.lioness@nospam.earthlink.net> wrote: >>>> >>>> >>>>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 >>>> >>> >>> Technically, the causes are high temperatures and rapid cooling, which >>> causes the NOx to "freeze" instead of decaying as the gases cooled. >>> >>> Since the expansion time is pretty much determined by engine speed, that >>> leaves combustion temperature as the factor we can control. Carbon really >>> isn't an issue directly, but it can cause preignition which has the same >>> effect as advanced ignition timing. The two big culprits are ignition timing >>> and mixture. Advanced timing increases combustion temperatures, and a leaner >>> mixture at high throttle settings (when it should be rich anyway to >>> forestall detonation) does the same. EGR reduces the temperature by diluting >>> the mixture without affecting the air/fuel ratio. >>> >>> Mike >>> >>> >> >>good post. yes, check timing and mixture. mixture can be assisted by >>running a couple of tanks with injector cleaner through the vehicle. >>timing should be set with the maintenance jumper connected. and it >>should be dead-on, not just close. regarding egr, it's often addressed >>these days by increasing the overlap between exhaust and inlet valve >>timing, so make sure the valve clearances are correct. >> >>to the op, no, an oil catch can is illegal in california. > > >why is a catch can illegal? > >good advice guys, someone from another newsgroup claims that the car >DOES use an EGR and said to go to > >http://www.smpcorp.com/web_app/catalog/publicweb_bg.asp > >then put in part # EGV551 > > >i can see a mount near the valve cover where one WOULD go, but i think >the only cars of this era that had one are the ex and vx ? > >may have to adjust the valves, it's pretty tough to get the timing >dead on considering the rpm's go up when the fan kicks on to cool the >engine, and finding 650rpm's EXACTLY on the tach is just a guess. btw, rockauto.com is also coming up with the same product for the D15B7, and that mount area is on the backside of where the valve cover is, looks like where it would bolt on, only theres no opening into the engine there, or is there supposed to be? |
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