> > One question which is bothering me concerning pressure in my fuel
      > > system. The distance between the inline fuel pump and the throttle
      > > body
      > > where the pressure regulator is located is about 16 feet. The
     pressure
      > > sender is located about 6 feet before the pressure regulator.
     The fuel
      > > lines are 3/8 inch inside diameter throughout. The fuel is
     gravity fed
      > > about 11or 12 inches to the fuel pump which pushes it to the fuel
      > > regulator and throttle body, activating the pressure sender on the
      > > way..
      > > Is the fuel pressure the same at the pump outlet, the sender
     and the
      > > regulator? Yvon.
      > >
      > > Within a fraction of a psi between the pump and the fuel pressure
      > > regulator. Is there a return line from the fuel pressure
     regulator?.
      > > Sounds like the sender is measuring pump pressure and not injector
      > > pressure.
      > >
      > > Paul Lamar ...No rotor no motor.
      >
      > Yes Paul, forgot to mention that, The return line is from the
     regulator
      > direct to the top of the fuel tank. Yvon.


     Off topic but related,- I have just suffered a fuel pump failure in
     my LE Jetronic
     system on my BMW K100 motorcycle. Something jammed the rollers in
     the pump,
     it must have been very small because I couldn't detect it. It
     probably got
     past the inlet filter to the pump as the return to the tank tube, which
     feeds returned fuel directly into the pump, had come off.
     The thing that suprised me was the amount of wear of the commutator,
     it was 3mm smaller where the brushes run, the brushes had plenty of
     length!
     The bike has only done 142,000km, say 1500 to 2000 hours. Two sources
     were asking $693 = $600US for a replacement!
     It would seem unwise to fly without a backup pump in parallel, perhaps
     with an automatic changeover when failure occurs.
     Has anyone else observed similar wear in a pump?

     John Evans


John,

I had a recent fuelpump failure on my BMW R1150 GS. 18000 km. on clock.
It worked when I switched the bike off, did not work any more the next
morning on start-up. The price you mentioned is about what I paid for a
new pump at the dealer.

--
Erik Snyman
Messina
South Africa.

That's scary Eric! It sounds like even bikes need to run two pumps! It will be
interesting to see how the $139 locally produced pump I substituted stands
the test of time.

John Evans



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