Another 1 bites the dust; Was: Bosch fuel pump death

[james accordino]

I brought 4 FPRs with me and before I changed the pump
I tried them all.  No change.  Replaced the pump on
Sunday morning in the Army parking lot right where I
finally died.  Brought 3 OE German Bosch pumps: 85 5kt
(185k), 89 200q (185k) and one from a junkyard (age
and mileage unknown).  The last one "looked" the best
(nice shiny aluminum shell and nice shiny, new looking
terminals, nuts and washers.  My 2 that I had replaced
looked kind of tired.  The terminals had a dull, olive
drab tint to them.  The alloy shells were no longer
shiny.  I dipped each in gas and tested them for 5
seconds with jumper wires from a battery my buddy
conviently had in his trunk.  The nice shiny one
sounded great- zoomed right up to max. rpm and just
screamed.  The other 2 revved up slower, had a lower
peak rpm and were much noiser.  After replacing the
Czech bastard I tried the same test.  Sounded
horrible.  Like there were little bits of copper wire
flying around in side there.  So far "shiny" is super
quiet.  1/4 of the way through second tankful, about
600 miles.  Gas from different stations.  I think I'll
still check for that pre-delivery screen anyway.  BTW,
no debris in my tank at all.  Still shiny on the
inside.  A really little bit of sand in the very
bottom right under the pickup screen.  Also 2 human?
hairs on/in the pickup screen.  About the size of a
whisker or a nose hair.  Really weird.

Thanks
Jim Accordino

--- Joshua Van tol <josh at spiny.com> wrote:
> >> Could it have not been the fuel pump that caused
> the
> >> breakdown? This
> >> test doesn't have a pressure load like real use
> >> does...
> >>
> >> - Wallace
> >>    '87 5kcstq 190k
>
> Have you checked the fuel pump relay? Those are very
> shoddily
> constructed IMHO, and could cause a problem like you
> describe. If you
> remove it, pop the cover off and look at it you can
> see if it has
> failed solder joints. If you do decide to touch them
> up, watch out for
> leaving any loose balls of solder in there to cause
> a short and destroy
> the fuel pump driver in your ECU like I did. I still
> have spare
> transistors btw, if anyone needs one.
>


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