>
>  I could use a little help on this problem.  I apologize for the length.
>
>
>
> My engine recently started to show signs of fuel starvation. Cutting out
> above about 3K rpm.  It would just seem to go from 3K to idle.  I was
> running on my primary fuel pump, so I turned on the secondary and the engine
> would start to run normally.  (Not like gangbusters, but NORMALLY.  My max
> static rpm has been about 52-5300 rpm and I have felt that it was not
> getting enough fuel to run up to my goal of 6K static)
>
>
>
> I decided that I had a filter plugged,  and fearing the gasohol that they
> are now selling all over Florida, I opened up my Gascolator.  It was ok.  I
> found a couple of wisps of white fibers.  Could be fiberglass dust, could be
> spider  webs, something like that.  I don't think that I have had any
> gasohol in the plane, but it is probably possible.  But the Gascolator was
> fine.
>
>
>
> I then opened up the JEGS inline filter on the primary pump and the element
> was covered with a black sludge.  It seemed to be almost completely blocked.
> This stuff looked like maybe it could have come from the inside of the SS
> braided hose.
>
>
>
> I checked the secondary pumps filter and it was fine.  I have not used this
> secondary pump except on rare occasions to check for pressure changes,
> leaks, etc..
>
>
>
> But for that matter, I have only run three 5 gal cans of gas in the plane
> totally.  One 5 gal can in each wing, then another in the right side, and I
> am now pulling out of the left tank which has the fourth 5 gal in it.
>
>
>
> So, like I said, I at first thought that it was a rubber residue from when I
> installed the hose ends on the Aeroquip hoses because it sort of looked like
> that.  Then as I drove home, I remembered that there was none of this stuff
> in the Gascolator.  (I think that some should have made it there as there is
> one -8 hose in front of the Gascolator)  There is only about a foot of -8
> hose in front of the fuel pumps after the Gascolator, so now I am thinking
> that maybe it came from the fuel pump.
>
>
>
> Is there anything inside the pump that could cause a black sludge if it
> started to crap out?  What would I look for to check if the pump is out or
> going out.  Has anyone else had any similar problem?  I recently heard a
> squealing sound from the area of the pumps, but at the time I thought that
> it was bubbles going through the pump.  I was close to empty on the right
> tank and thought that it was sucking air.  I switched tanks and the sound
> went away.
>
>
>
> I have not yet checked my injectors.  Two  reasons:  I have no idea of how
> to do it and would not know what to look for.  Is the 40 micron screen fine
> enough to keep anything from getting plugged up in the injectors?  If not,
> what do I look for, and where?
>
>
>
> I would greatly appreciate some input as to your thoughts on this.  How
> would you proceed?
>
>
>
> My fuel system goes: Finger strainer in tank, ½ inch aluminum line to Andair
> dual valve (switches both supply and return to same tank), Aeroquip -8 SS
> braided line, boost pump, Aeroquip -8 SS braided line, Andair Gascolator,
> Aeroquip -8 SS braided line about one foot to splitter to two fuel pumps,
> (these are the pumps that Tracy sells), each pump is followed by a JEGS
> billet in line fuel filter with a stainless 40 micron element.  Then a
> splitter to bring them back together to Aeroquip -6 SS braided line, primary
> injector rail, Aeroquip -6 SS braided line, secondary injector rail,
> Aeroquip -6 SS braided line, Aeromotive fuel pressure regulator, Aeroquip -4
> SS braided line to the valve and back to the tank.  The tanks are fiberglass
> with ProSeal.  This is a Lancair Legacy, Renesis engine.
>
>
>
> Thanks for the help.
>
>
>
> Bill B
>
>