Scirocco Gross polluter

[roccit53 at gmail.com (C Boyko)]

O2 sensor you can test at least, so that'd be easy to rule out. (simple
voltage test)
cathy

On Nov 29, 2007 8:08 AM, Michael Laughlin <michaelnl@xxxxxxxxxxx> wrote:

> Yeah, the car has been sitting "stored" for the last 4.5 years - even
> though my dad made sure to drive it every week or two.  I also don't know
> how old the gas is that is in it.  I might try timing (it is most likely
> advanced a bit), plugs, new gas (would a fuel treatment help?). if it still
> fails then try cat/o2 sensor.
>
>  ------------------------------
> Date: Thu, 29 Nov 2007 07:55:52 -0500
>
> From: roccit53@xxxxxxxxx
> To: michaelnl@xxxxxxxxxxx
> Subject: Re: Scirocco Gross polluter
> CC: scirocco-l@xxxxxxxxxxxx
>
> Well, that HC and CO isn't awful, is it, I mean, they may just pass on
> another run. But those could easly end up near zero, so they're not perect
> for sure.My understanding of how the three are produced:
> NOx is hard to produce under normal conditions because atmospheric
> nitrogen is pretty stable. But if you subject it to a very hot/squished
> cylinder event, it will be created. Hot (lean) we can do something about by
> richening some, "squished" is likely a factor of the engine  design(and 16Vs
> are pretty high compression) though timing of the ignition event impacts
> that.
> HC and CO often go hand in hand, they are indicative of incomplete
> combustion for whatever reason. First, they always advise fresh oil ( as it
> can get pretty stinky), and fresh plugs. Neither is a bad thing for the car
> anyway. High test also is generally advised too. But as far as what it
> indicates about your engine tune is:
> a) there is too much gas to burn properly (too rich)
> b) there is way too little gas to burn (this seems odd, but overly lean
> mixes don't burn as well as they should and send HCs down the tailpipe)
> c) spark is coming in at a time when the piston is at a poor spot to allow
> for a complete burn ( ignition timing) Go on the Innnovate site and look up
> the Notes from Klaus for a good article on ignition timing. Not my Klaus
> BTW.
> Other things: If your O2 sensor is dead, the -E part of CIS-E can't fine
> tune your mixture, so it runs on limp home mode. I'm pretty sure this is a
> too rich situation, but if it had run like that for a while, it may have
> killed the catalytic converter. And finally, how is you cat? If it's dead,
> it can't eat up that excess stuff. I was very frustrated etesting my 16V,
> because I just couldn't tune it to get it to pass. But a new cat solved it
> beautifully. I got mine put on 3 bolt flanges, so I could put it in for the
> test every time, that way I knew it was in good shape. Then I bolted a
> similar looking hollow one in for the rest of the year, if the car was
> running rich, I knew I wasn't killing the cat (I was killing the air I
> guess) Maybe tonight I'll dig up my before and after cat ETest numbers. I
> bet a fresh cat would fix yours up, they're pretty good at eating NOx, and
> tht little bit of HC that needs to go away for a pass would go away too.
>
> On Nov 28, 2007 9:37 PM, Michael Laughlin <michaelnl@xxxxxxxxxxx> wrote:
>
> My HC was 115/46 (max 130/105) and CO was .60/.38 (max .80/.69) ...  would
> getting an autotech fuel module help it not run lean?  It would add a little
> more power too but, it might cause other issues and I don't really have the
> cash right now (although, I would like to add it eventually).
>
>  ------------------------------
> Date: Wed, 28 Nov 2007 21:24:37 -0500
> From: roccit53@xxxxxxxxx
> To: michaelnl@xxxxxxxxxxx
> Subject: Re: Scirocco Gross polluter
> CC: scirocco-l@xxxxxxxxxxxx
>
>
> How was HC and CO? High NOx is usually a problem if you're running lean
> (and have high compression, as in a 16V) or at least that's my
> understanding. My 2L 16V often had both high HC and NOx, and a newer cat
> solved it nicely.
>
> On Nov 28, 2007 9:00 PM, Michael Laughlin <michaelnl@xxxxxxxxxxx> wrote:
>
>
> Sorry to return to the list after so long and be more of a lurker not
> poster but, my 88 16v arrived Friday from my home state of Pennsylvania and
> I finally got the paperwork today that would allow me to register it in
> California.   I was very excited and took it to get smogged after work and
> then.....
>
> FAIL
>
> It says that NO was measured at 2380/1048 and max was supposed to be
> 835/774. They also claimed that the vaccum lines to some unnamed sensors
> were disconnected (possible) and the fuel evaporative control was modified
> (don't think I ever touched that).
>
> I do have a 1.8l to 2.0l conversion, cams and intake but, the car passed
> in Cali in 2000 with this set up.    Does it sound like I can fix a few
> simple things or will this require me to sell the car out of state?
>
>
> -Mike
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