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.