[tech] Help diagnosing an 8V?

[krobins2@twcny.rr.com (Kenneth & Georgianna Robinson)]

Oops....me bad!! Ken R.
----- Original Message -----
From: "Night Shadow" <soltwede@privateI.com>
To: "Kenneth & Georgianna Robinson" <krobins2@twcny.rr.com>
Cc: "Michael Carlson" <m-carlson@comcast.net>; <scirocco-l@scirocco.org>
Sent: Monday, August 12, 2002 11:42 PM
Subject: Re: [tech] Help diagnosing an 8V?


>
> Being that he has an 84 Scirocco listed in his sig, I have a feeling he
> doesn't have an ISV (that is a CIS-E thing), and 84 Roccos run CIS-Lambda.
>
> Michael, when you hear the car run rough, does the buzzing of the
> frequency valve change?  Sounds like the system is adjusting the mixture,
> badly.  Time to break open the bentley and get a dwell meter, you can see
> what your Oxygen sensor is telling the Jetronic brain to do.  Could be
> your mixture has changed, or, more likely, your oxygen sensor has gone
> bad.  Try hitting the full throttle switch while it is idling, let us know
> how the engine acts when you do that.
>
> Eric
>
>
>
> On Mon, 12 Aug 2002, Kenneth  & Georgianna Robinson wrote:
>
> > Does your car have a ISV?? Sounds like that's going bad.My guess
anyway.Ken
> > R.
> > ----- Original Message -----
> > From: "Michael Carlson" <m-carlson@comcast.net>
> > To: <scirocco-l@scirocco.org>
> > Sent: Monday, August 12, 2002 10:51 PM
> > Subject: [tech] Help diagnosing an 8V?
> >
> >
> > > My Scirocco has taken ill after yesterday's autocrossing activities.
:(
> > > She ran fine before and during the event, but the drive home was a
> > different
> > > story.
> > >
> > > Basically, it feels like she's missing on a cylinder below 3000rpm.
> > (Sounds
> > > like a darned aircooler!)  Above that, power comes back on and she's
> > > purring.  Letting off the throttle and stepping back on it seems to
> > > exacerbate the issue, sometimes with a misfire.  (Heh, I said
exacerbate!)
> > > At idle, she'll purr for a few seconds, then run rough for a few
seconds,
> > > then purr for a few seconds, then run rough for a few seconds, etc...
> > >
> > > I've replaced the distributor cap and rotor, which were looking quite
> > worn.
> > > No change in behavior though.  Any suggestions on where to start
looking?
> > >
> > > Thanks in advance,
> > > Mike Carlson
> > > '84 Scirocco Wolfsburg Edition
> > > '95 GTI VR6
> > > http://www.divergent.org/mikes.vws/
> > >
> > >
> > >
> > > _______________________________________________
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> > > Scirocco-l@scirocco.org
> > > http://neubayern.net/mailman/listinfo/scirocco-l
> > >
> >
> >
> > _______________________________________________
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> > Scirocco-l@scirocco.org
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> >
>
> --
> Eric
> Northglenn, CO
>
> 76 Honda CB400F Super Sport (400cc, 4 cyl, OHC 8v, 10k RPM redline *grin*)
> 80 Scirocco (FOR SALE $500)
> 81 Scirocco S (2.0 16v swap and complete restoration in holding pattern)
> 81 Rabbit Truck LX Diesel (Waiting for BAE Turbo Install)
> 87 Suzuki Samurai JX Hardtop (Soon to be VW Turbo Diesel Powered)
> 91 Cabriolet (2.0 Crossflow 8v swap and mechanical rebuild in progress)
>
> "For Aquarians, the physics of loopholes is a perfectly valid science."
> -Kelli Fox
>