Reduced power and Reduced turbo boost

[Jay Darst]

I think there were some posts on that a year or 2 ago.

Good thought, Thanks.

Jay Darst
85PT40 6V92
SpringfieldIL


--- In WanderlodgeForum@yahoogroups.com, "Mike Hohnstein"
<MHOHNSTEIN@w...> wrote:
> Some times them hoses delaminate, it's not good when that
happens. I had problems that I suspected were due to old flexible
line. I replaced it all, stuff wears out.
> Mike Hohnstein
> Germantown, WI
> 83FC35
> ----- Original Message -----
> From: Jay Darst
> To: WanderlodgeForum@yahoogroups.com
> Sent: Monday, May 02, 2005 9:16 PM
> Subject: [WanderlodgeForum] Re: Reduced power and Reduced turbo
boost
>
>
> The "FUEL VACUUM" gage is now reading very high into the red,
which
> would indicate that the fuel pump is really having to work(suck)
to
> pull fuel through the Racor.
>
> I would use air pressure to relieve any blockage in the fuel
line
> that connects the fuel tank to the Racor, but then how would the
> line be refilled so as to avoid air in the line?
>
> With the "FUEL VACUUM" gage reading an unusually high vacuum, I
am
> fairly certain that this is a fuel delivery problem.
>
> So far, attempted repairs in chronological order:
> 1.)replace Racor fuel filter
> 2.)replace Spin-On fuel filter
> 3.)Again, remove and inspect Racor filter, empty contents of
Racor
> filter, remove bottom half of Racor filter for inspection and
> cleaning.
>
> It appears that the FUEL VACUUM gage is plumbed directly aftter
the
> RACOR filter, which would place it between the RACOR and the
SPIN-ON
> fuel filter. That being the case, it would seem that by removing
the
> contents of the RACOR, the FUEL VACUUM gage would read 0 since
there
> could would no longer be resistance, hence the RACOR filter
canistor
> is now empty.
>
> Replaced Racor filter, refilled with fuel and started engine.
Runs a
> bit un-even. Pretty sure its starving for fuel.
>
> HELP?!
>
> Thanks
> Jay Darst
> 85PT40 6V92
> SpringfieldIL
> --- In WanderlodgeForum@yahoogroups.com, John Suter
> wrote:
> > Jay,
> >
> > I do not want to be an alarmist, however check the
> > castings and flanges which deliver the boost air to
> > the engine (I think to the aftercooler) for cracks
> > that permit pressure leaks. Just before FMCA I saw
> > coach with symptoms that you describe, which delivered
> > leaking hot exhaust air into combustible areas of the
> > engine compartment. The cracked areas, once
> > discovered, were barely visable behind the large fan
> > but careful inspection permitted first a fingernail,
> > then a knife blade to be inserted into the gaps.
> >
> > John Suter
> >
> >
> >
> > --- Jay Darst wrote:
> > > Just returned from a 876 mile round trip to Elkhart
> > > Lake, WI.
> > >
> > > Noticed the fuel vacuum gage in the red. So changed
> > > Racor fuel
> > > before heading back home. Still the gage read in the
> > > RED. So, 1/3 of
> > > the way home, changed the spin on fuel filter. Still
> > > the gage read
> > > in the RED.
> > >
> > > The gage seems to have always worked before.
> > >
> > > Before and after changing the Racor filter and
> > > subsequently the spin
> > > on fuel filer, my boost gage would see 20psi.
> > >
> > > Later, when almost home(and dead dog tired) seemed
> > > that power was
> > > less than normal and boost would only see 15psi.
> > >
> > > The last tank of fuel was treated with Lucas fuel
> > > treatment, 1
> > > gallon Lucas to 300 gallons of fuel.
> > >
> > > Any suggestions as to why the loss of power and
> > > boost with fresh
> > > filters?
> > >
> > > Thanks
> > > Jay Darst
> > > 85PT40 6V92 Detroit
> > > Springfield, IL
> > >
> > >
> > >
> > >
> >
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