Failed emissions

[scirocco at vintagewatercooleds.com (Eric S)]

Add Colorado to the list of Emission nazi states with Dynos....

Ok, so all indicators are showing you running rich.  O2 is suspect, as is
your coolant temp sensor on CIS-E.  What are your DPR current settings? 
Yes the 3 mm screw can affect (minory) the mixture while running...do the
DPR test and adjust the screw till its right.

-- 
Eric
www.vintagewatercooleds.com

1981 Scirocco S (TDI swap project)
1981 Rabbit Truck LX Diesel -FOR SALE-
1990 Corrado TDI -FOR SALE-
1990 Fox Wagon
1991 Cabriolet (2.0 crossflow 8v project)
1994 Jetta GL

Eric Person said:
> My car just failed the HC portion of the test, so I need to lean this
> thing out a bit.  In Chicago, we have a limit of 2.0 gpm HC, and my car
> tested at 2.42.  Im not sure how bad that actually is, but seems like im
> going to have to lean it out quite a bit to be safe.  We have to run on
> a dyno, at varied speeds, not just at idle, so just fixing the idle
> mixture isnt going to do much for me.  It looks like the HC is spiking
> on lift throttle between shifts(which is expected) but is hanging out
> just at or over the limit at almost all points.  The CO is just fine
> (half of the limit), and NOx isnt an issue, which is good because I have
> no cat.  The cat shouldnt affect the HC level anyways, right?  It just
> catalyzes NOx and  CO, correct(Its been a few years since my IC engines
> class).
>
> So what are any tricks to get this thing to burn a few more hydrocarbons
> on the way out?  I'll probably replace the plugs, maybe check ign
> timing.  Would replacing the oxygen sensor help a lot?  And I seem to
> remember a certain 3mm allen screw, but im thinking that just changes
> the idle mixture, IIRC.
>
> Any ideas Cali or NYC people?
>
> Eric Person
> 86.5 16v
>
>
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