[Vwdiesel] new engine running rough, why?

[Harmon Seaver]

   Was this the first time you ran biodiesel in the vanagon? If so, being the
super solvent it is, it would clean all the crud out of your tank and plug the
filter quite quickly.


On Mon, Sep 16, 2002 at 12:47:13PM -0700, maded wrote:
> Greetings from Seattle,
>
> We took the Vanagon out for the first "big" trip this weekend since
> installing the new AAZ 1.9td engine.  This is installed like the original
> 1.6na, i.e., 50 degrees.  We filled the tank with a 1/2 Biodiesel and 1/2
> Shell "premium" diesel mix and drove off to Mt Rainier and it ran like a
> top, smell like popcorn, keeping up with traffic, no smoke, starting warm
> with nary a hiccup at the cold start in the morning.
>
> The next morning (after enjoying Vanagon Westy camping) the engine was
> started easily but  puffed clouds of white smoke fading to black fading to
> none as the engine quickly warmed.  The sound was something like  "rrrrr
> uhrrr uh ruh rrrruh rrrrrruh rruh uh rrrrrrrrruh rrrrruh" and so on.  The
> temp was about 56f and we had put about 120 miles the previous day.
>
> I know this is not uncommon.  In fact this is the way the Golf runs every
> day except the smoke is black and never white.  My concern is that the
> Vanagon is a new engine, I have less than 1k on it and it supposedly is new,
> run for factory break in only.  It has the AAZ two detent cold start and my
> wife swears that the detent was all the way out at the fast idle position
> when she started it and it did sound like fast idle.  It occasionally has
> made a puff-rough sound for me but this is the worst I have seen yet, like
> maybe a glow plug was out.
>
> What opinions have you all?  Has the Biodiesel done anything?  Have one of
> my new injectors gone bad already?  Has a brand new glow plug quit?  Should
> I quit worrying and enjoy my new found power while watchfully waiting for
> winter?  BTW, started this am about 65 deg with just a couple of uh uhs'
> with the fast idle pulled out, started on the first turn (cold).  When hot
> it always needs to crank3-4 seconds to start.  The number 1 injector showed
> some wetness around the barrel when I first started driving it, even some
> very slow bubbles, then this wetness stopped.  First mileage check was
> 24mpg.  Now you know as much as I.
>
>
> --
> Ed Lowe, Seattle
> 82 Westy diesel upgrading to 1.9td
> 85 Golf diesel
> 92 Cabrio
> 97 Passat Tdi
>
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--
Harmon Seaver
CyberShamanix
http://www.cybershamanix.com