Julia's Problem

[Leroy Eckert]

I can understand loss of power with a restriction in the induction system,
collapsed hose, dirty filter etc. Without induction air and exhaust the turbo
isn't gonna work properly.

Knowing my unit's numbers, I'm trying to determine how Julia's bus got from
Gainesville, TX to Van Horn with a plugged air filter with no problems,(must be
one big bad boy) only to be towed to El Paso. This could happen to any of us. I
think that is the key here, really.

1. It's hard to envision an air filter so dirty that the engine will not run,
and do so intermittently, over a 500 mile range.
2. I would think an 8v92 could get you to a repair station without the turbo.
Can't be in a hurry.

That is why I suggested the throttle issue. Of course I could be totally wrong.
I just cannot believe it has anything to do with paper.

Leroy Eckert
1990 WB-40 "Smoke N Mirrors'
Niceville, FL








----- Original Message -----
From: davidkerryedwards
To: WanderlodgeForum@yahoogroups.com
Sent: Friday, December 08, 2006 11:07 PM
Subject: [WanderlodgeForum] Re: Julia's Problem


I had a similar problem this past summer and I understand how Julia's problem
could
possibly be caused by a partially plugged filter. In my case, the filter let
enough air pass thru
to run under normal conditions. However, when the trans. downshifted on a
steep hill, the
turbo would spool up quickly, greatly increased the vacuum in the intake tube
between the
filter and the turbo. This vacuum would collapse the rubber hose section of
the intake tube
and shut off air, making the engine shut down.
This doesn't explain the transmission codes but it is a possible scenario in
which a partially
plugged air filter can function under some conditions but cause problem under
other.
Perhaps the transmission code is caused by the transmission acting oddly in
response to the
reduced power from the engine.
My problem was diagnosed quickly by a shrewd mechanic names 'Shrimp' who had
seen the
same thing happen a few months earlier on another CAT 3208. Both filters had
been
plugged for the same reason, a relatively small exhaust leak in the vicinity
of the filter,
sucked in soot, partially plugging the filter.

Kerry
82 FC 35
Denver
Now carrying a spare air filter





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