Re: Failed emissions!!!

["Harold McElraft" <hmcelraft@xxxx>]

It sounds like uneven cylinder combustion. Could be injectors or 
even the injector seals or a bad plug wire (occasionally the boots 
at the plug can be pushed on without contacting the sparkplug 
properly). Is the test at idle or under load? You might try to use 
the idle adjustment screws (the brass ones) to smooth out the idle.

Harold McElraft - 3354


--- 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 
> it in the first place. 
> 
> Here some things I have found: the dwell meter reading drops 
> considerably when the cooling fans activate. The engine 
oscillation 
> doesnt change, I am sure it just has something to do with voltage 
> drops or something. 
> 
> Also when the cooling fans activate there is a whining sound from 
the 
> engine somewhere, almost sounds like a vacuum leak, but only when 
the 
> fans are on! 
> 
> And finally a question about emissions: Is NOx inversely 
proportional 
> to the HC and CO. It seems that as I decrease CO and HC, the NOx 
is 
> higher, and vice versa. 
> 
> Thanks everyone! adam
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "Adam 16683" <acprice1@xxxx> wrote:
> > Thanks Andy and Harold. I think you are right that I may not 
have 
> > adjusted the mixture how I thought I did. I am going to do what 
> Andy 
> > said and get me a dwell meter!
> > 
> > Thanks for the help!
> > Adam Price
> > 
> > 
> > --- In dmcnews@xxxxxxxxxxxxxxx, Soma576@xxxx wrote:
> > > In a message dated 10/21/2003 7:33:58 PM Eastern Daylight 
Time, 
> > acprice1@xxxx writes:
> > > 
> > > > My car failed emissions for THC and CO. It passed for NOx. 
> > > > 
> > >> 
> > > Now that i finally understand the dwell meter use, let me try 
to 
> > help you.
> > ..> good luck - it took me 3 years and i'm only now getting my 
idle 
> > straightened out the way it should be. but it's worth it to 
know 
> > everything is working AOK.
> > > 
> > > Andy