Re: Failed emissions!!!

["David Teitelbaum" <jtrealty@xxxx>]

You can't always make a car pass emissions testing by making
adjustments. Sometimes you have to replace worn parts. How old are the
spark plugs and wires? Worn plugs and bad wires will cause high HC. A
bad catalytic converter can also do it. If the timming is off it can
do it. Just getting the Lambda to work isn't always going to get you
what you need. Even a dirty air filter can keep your HC up. You will
hear a louder whine from the alternator as it makes more electric when
the cooling fans kick in. You are figureing out you never get
something for nothing, as you improve one emission you just balance it
off to another. CO is hard to control, HC is the easiest, NOx is
largely affected by the combustion chamber temperatures and pressure
so you can't change it all that much but it does go up as the HC goes
down, you are burning more HC so the combustion chamber temps and
pressure go up causing the NOx to increase.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "Adam 16683" <acprice1@xxxx> wrote:
> My car is still failing emissions! However it is definately better 
> than before. CO is in control, and HC failed by 0.2!! I dialed in the 
> CO as best as I can get it with my dwell meter, its hovering right at 
> 30, oscillating between 28~32. With my CO dialed in my car idles 
> rougher, and is even worse during warm-up, which is why I enrichened 
>