John wrote:<<when you pump it you throw the pump into WoT and it
starts dumping lots of fuel >>
As you say - that's the reason for not touching the accelerator pedal - not
only do you get all that fuel in the chamber - it's very *cold* fuel to
boot! Which means the GPs have a bunch more fuel to try and ignite, it's
starting from a colder temperature.
I believe it happens like this - you turn the key, a spritz of fuel is
injected to the proper cylinders, concurrently, the GPs start heating the
prechamber or cylinder depending on model - and you *eventually* start
cranking after 15 seconds or so depending on temps etc - then, just as it's
beginning to start, you push (or pump) the throttle pushing lots of of
(un-needed), cold fuel into the prechamber - where it has to be heated
before it can ignite -
So pumping when trying to start in cold temps is a bad thing. Once it's
running on all/most cylinders I suggest easing on the throttle slightly to
get the revs to about 1000rpm and keep it there for ~30 seconds or so before
driving off sedately.
Happy winter dieseling!
Larry T (67 MGB, 74 911, 78 240D, 91 300D)
www.youroil.net for Oil Analysis and Weber Parts
Test Results http://members.rennlist.com/oil
PORSCHE POSTERS! youroil.net
Weber Carb Info http://members.rennlist.com/webercarbs
Porsche Road Test http://members.rennlist.com/roadtest/
.
----- Original Message -----
From: "John W. Reames III" <[EMAIL PROTECTED]>
To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Sent: Sunday, January 07, 2007 4:03 PM
Subject: Re: [MBZ] Trying out 0Wxx Mobil 1
On Fri, 5 Jan 2007, Zoltan Finks wrote:
Yup. I know pumping is bad - my foot just wants to do it. I'ts like, come
on, baby, you can do it!
Yes, starting is an emotional thing with me ;) - nothing worse to me than
the sound of the starter running slower and slower. Need to get over it -
I
know.
Yep, tho consider when you pump it you throw the pump into WoT and it
starts dumping lots of fuel in the cylinders. This can make it REAL hard
to start (when you DO get it to start after pumping you will be rewarded
with a massive coloud of smoke, possibly blue/grey or maybe black
depending upon how cold it is outside.
-j.
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