[Vwdiesel] smoke related to driving style

[Val Christian]

> 
> Could it just simply be gentle driving allows accumulation of soot in the
> exhaust. Extra energy in flooring it loosens it off again. After all the

	Don't think so.  It happened on a tractor I used, with only the 
	exhaust manifold on.  Not much to collect soot in, compared with
	the visible carbon emissions.

> turbine manages to find the extra energy and turn it into mechanical
> energy. So why can't the soot particles see this energy too.?
> One of my paranoia's is that the annual opacity test involves flooring it
> by the inspector. "Readings spoilt by loose soot?"

	I suggest driving it hard just before the test.  

	My theory is that the hard drivin' stomps off the gunk
	on the injectors.  Doesn't happen with brandnew injectors
	until they have 5 or 10K on them.  Doesn't happen as much
	with newer injectors with conditioner in the fuel.

	Theory only.

	Val


> MTM
> ----- Original Message -----
> From: Val Christian <val at mongobird.com>
> To: Sandy Cameron <scameron at compmore.net>; <vwdiesel at vwfans.com>
> Sent: Monday, November 07, 2005 12:44 AM
> Subject: Re: [Vwdiesel] smoke related to driving style
> 
> 
> > The exact same symptoms occur on my car.  The mileage reported is about
> > the same as well.  I have a 91 NA.
> >
> > No turbine wheels.  We need a new theory.
> >
> > Strawman theory.  Light foot allows carbon and longer chain molecules
> > build on the pintle and other portions of the injector, and are knocked
> > free with high fuel flows.
> >
> > Observations: Driving hard, keeps smoke clean all the time.  Rara to the
> > lead foot.  Also, keytone and tolulene additives "injector cleaners"
> > and "fuel conditioners" seem to reduce the intermittent lead foot
> > smoke production.  "Stomp smoke."
> >
> > Val
> >
> > >
> > > At 05:40 PM 11/5/05 -0500, you wrote:>
> > > >Is it a carbon build up issue?  It only seems to do it when I drive it
> easy
> > > >and then push it hard.
> > >
> > > My TD does that. Reason says that carbon sticks to the turbo wheel with
> easy
> > > driving, and comes loose on high boost / high RPM
> > >
> > > Effective way to disuade tailgaters. I always seem to have a supply in
> store
> > > when needed.
> > >
> > > Sandy
> > >
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> >
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> 
> 
> 
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