Julia's Problem

[davidkerryedwards]

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