Re: More on moaning

Msg # 5327 of 8004 on Powerstroke Diesel Conference (1)
To: Larry, From: Josh
Time: Friday 01-30-98, 04:19 pm

MY powerstroke does the same thing I learned from
jason and the rest of the bunch it is the warm up
valve by the turbo making the problem.  It closes
and is not letting the exhaust gases go by so that
is the moaning you are hearing.    
On Friday 01-30-98, 02:22 pm, Larry said:
-My truck has had a strange moaning sound from the
-engine compartment since its first winter and I'm
-undecided on taking it in for warranty service or
-not.  What I have is a loud moan when the engine is
-between 1900 and 2000 rpm when the outside air
-temperature is below approximately 30 F.  The
-colder the air temp the louder the noise.  It
-sounds like a resonance in the exhuast system and
-is independent of throttle opening.  The rpm range
-is very narrow and it is quiet at 1900 and 2000 but
-roars in between.  I'm not sure this is what the
-TSB covers but am seriously considering trying a
-claim on it.
-
-Larry

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