SMOGII check is killing me!

[S Dewitt]

Does your coupe have egr?

Scott DeWitt
Advanced Automotion
817-939-6761
----- Original Message ----- 
From: "Huw Powell" <audi at humanspeakers.com>
To: "Tony Lum" <tlum at flash.net>
Cc: <quattro at audifans.com>
Sent: Tuesday, September 07, 2004 8:51 PM
Subject: Re: SMOGII check is killing me!


> just some random comments...
>
> > Well the state of California wants to take my gross pollutin'  87.5
> > coupe GT off the roads.  Its failing the NOx portion of the test and I
> > just failed AGAIN after I:
> >
> > 1. Installed new wires, dist. cap, rotor.  First failure, I had new
> > W7DTC plugs, air filter, oil and filter change.
> > 2. Replaced rotted air intake hose (NAPA p/n BD825-6028  is a perfect
fit)
> > 3. Installed new thermostat (80 deg) and matching switch
>
> I prefer the 87 degree thermostat, and so might your engine.
>
> > 4. Set fuel mixture (0 mA +/- 1 mA)
> > 5. Set timing dead on at 15 deg BTDC with fuse inserted in fuel pump
relay.
>
> Pull it back to 12 degrees, which I believe is stock.  Advancing gets
> you power at the expense of emissions, I believe.
>
> > 6. Filled with 12 gallons of  Chevron 91 supreme with bottle of
Techroline.
> > 7. Checked compression: #1 160; #2 155; #3 158; #4 160; #5 155 (~165K on
> > the odo).
> > 8.  Flushed nearly full cans of Berryman B-12 and SeaFoam carbon cleaner
> > through the charcoal canister opening with the engine at high idle-no
> > easy feat to do this operation.
> >
> > And it still failed.
> >
> > HC: 188 (max 116 @ 15 MPH-Failed); 27 (max 91 @ 25 MPH-passed)
> >
> > CO%: 0.68 (@ 15 MPH) 0.22 (@ 25 MPH) both passed
> >
> > NO(x): 2760 (max 791 @ 15 MPH-Gross Polluter); 1297 (max 730 @ 25
> > MPH-Failed)
> >
> > I'm running out of ideas here-the smog guy thinks with the readings I've
> > got, a new CAT won't do it.  BTW, the CAT and O2 sensor were installed
> > new in 1999.  My A/F gauge shows the engine in closed loop and cycling
> > in sync with the DPR current.
>
> So your OXS must be at least limping along.  "New in 1999" means "very
old."
>
> > Maybe I need an over night soak with SeaFoam filling the CC- I just
> > don't know.  BTW, the engine starts instantly and consistently returns
> > 27-32 MPG.  One thing I haven't checked is the waxstat controlled flap
> > in the airbox, its hard to get to.
>
> That shouldn't affect warm operation, it is there to get preheated air
> off the exhaust manifold when everything is cold.
>
> My vote would be for a new cat (or used, if you can convince someone to
> sell you one), if the t-stat doesn't help.  I don't think it is working
> anymore.  CO is under control because the OXS is still working.
>
> -- 
> Huw Powell
>
> http://www.humanspeakers.com/audi
>
> http://www.humanthoughts.org/
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