Wierd application, hypothetical question.

[Wes Branchflower]

What would happen if there was no 'safety featrure' someone before mentioned 
running?

Also a friends car (petrol) (old), after turning of the ignition, would 
diesel. I thought this was from carbon build up, creating higher 
compression, therefore ignition? I adjusted the spark timing, and it seemed 
to help. Why?

Thanks


>From: chetwagner at qwest.net
>Reply-To: diy_efi at diy-efi.org
>To: diy_efi at diy-efi.org
>Subject: Re: Wierd application, hypothetical question.
>Date: Thu, 21 Dec 2000 11:37:47 -0700
>
>I have a friend who used to be a mechanic on some of the US Coast
>Guard ice breakers and has had to deal with runaway engines
>before.  He said that sometimes the oil seals around the intake valve
>would go, or the engine was generally worn, and the leaking oil into
>the cylinder would cause the engine to either continue running or
>runaway to the point of blowing cylinder heads and gaskets, but no
>rods or cranks.  Must have been a designed safety feature.
>
>On 21 Dec 2000, at 11:14, Bruce Plecan wrote:
>
> >
> > Most notibly diesels, can go into a run away state,
> > What can happen is the fuel cools some metering down til it ices, and
> > then goes very rich.  With no butterfly to close, and the metering
> > *locked* at WOT.  The revs can soar.......... You'll know it when you
> > hear it.  Or at a tractor pull see the people run.
> >
> > On a gas engine, without enough return spring if the linkage breaks
> > (and there is enough air flow to keep the butterflies open), again
> > that would be a runaway.  Nowadays, the shafts are sometimes off set,
> > or the butterfly opening set just off of center, so that is about
> > impossible to happen.
> >
> > Probably other conditions
> > Bruce
> >
> >
> >
> > > Excuse my ignorance, but what is a 'runaway'?
> > >
> > >
> > > >From: "Shirley, Mark R" <MarkRShirley at eaton.com>
> > > >Reply-To: diy_efi at diy-efi.org
> > > >About all you can do at that point is wave a rag in front of the
> > > >intake, and hope it chokes it.  Although I have heard of a person
> > > >doing that during a runaway, and the exhaust puked red cloth dust a
> > > >second or two later.
> >
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> >
>
>
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