Re: Engine questions

[David Bongo <dbongo@xxxxxxxxxxxxx>]

John Hofstetter wrote:

> On Saturday, June 14, 2003, at 06:26  PM, David Bongo wrote:
>
> > The engine is dieseling.  A former mechanic at work told me that's what
> > it was, and how to remedy it.  I didn't get a chance to write it down
> > so
> > I figured I'd check with you guys before doing anything.  As I recall,
> > he said to get some choke cleaner and spray it on the choke.  But he
> > may
> > have mentioned something else that I forgot as we got sidetracked by
> > other things, then I had to go make a high-pressure, time critical, but
> > ultimately pointless 20 mile trip to the next town.  But I digress.
> > What do I need to do to fix the dieseling problem?
> >
> > Thanks,
> >
> > Dave
> >
> Dave,
>
> I dont pretend to have all the answers in regard to your dieseling,
> but .....
>
> The dieseling, at least in my experience, is caused by carbon in the
> cylinder that stays red hot and sets off the next explosion as soon as
> compression is built up in that cylinder. A tank of higher octane gas
> will sometimes help. A cup of ATF down the carb can help get rid of the
> carbon in the cylinder. Sometimes putting in new and correct plugs will
> help. Autolite 85s are the ones I use, thanks to the digest gurus.
>
> John Hofstetter

John,

Thanks for the reply.  I'm going from "easy and cheap" to "hard and
expensive" in solving this. See my previous reply to this list for the first
round. Would a single tank (or 2) of higher octane gas help?  Or would I more
likely have to switch over full time?  Wouldn't be worth it do that.  At an
estimated 8.3 MPG I'd use up a LOT more money by switching to a higher octane
gas.

The spark plugs should be good.  The engine was rebuilt very recently and has
probably under 2000 miles on it.  (Under half of which are delivery.)

If carbon is building up I'll want to fix that, though.  It can't be good for
the engine (even if it's not specifically bad.)

Thanks for the help.

Dave