dieseling:
2 causes!
1 glowing carbon bit in a cylinder causing an actual diesel effect. where
and why of the carbon? time to do some detective work.
2 improper closing of the throttle plates or a vaccume leak.
possibilities of adjustments of both throttle plates are not synchronised in
their opening and closing. possibility of hanging up in the motions of the
2 throttle shafts. or a leak elsewhere? also excessive wear of shafts or
their orifices?
more detective work!
chuck.
----- Original Message -----
From "James Gruber" <thistle_3619 at yahoo.com>
To: "Spridgets Digest" <spridgets-digest@autox.team.net>
Sent: Thursday, April 11, 2002 1:01 AM
Subject: Dieseling Problems
> Bugsy is having a problem with dieseling when I shut
> him off and the problem seems to be getting worse the
> more I drive him. About 150 miles of driving so far
> andevery time I shut him down he wants to keep going
> and going. Engine is a '66 1098 that was trasnplanted
> into Bugsy. Could the fact that this is an engine
> designed for leaded gas and I haven't used a lead
> additive be contributing to the problem. I asked this
> question some months back and I was told by a number
> of folks on the list not to worry about using a lead
> additive. When the valve seals finally go then replace
> them with unleaded valve seals.
>
> Now I haven't started going through Chris Kottings
> excellent treatise yet on Tuning 101 so other things
> may really be slightly out of whack and causing the
> problem. Just need to find time to dig into it. I just
> don't want to cause a problem with Bugsy. Engine runs
> fairly sweet, sometimes too rich, but pulls strong and
> doesn't burn oil. How about everyones feelings about
> lead additives and pre '68 Spridget engines.
>
> I had some speculation about carbon buildup as Plugs 1
> & 4 are clean while 2 & 3 pare all carboned up after
> 150-200 miles on a fresh set of plugs.
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