[V8] Imminent Fuel Pump Failure?

[too many quattros]

the two pumps are totally different.  ingo is right that the sizes are
different and one needs a cage update.  however, one of the two pumps has
been discontinued.  if u have the one that is NLA, u have to buy all the
parts to convert over to the other.  NOW, keith tackett posted a way some
time back to convert our cars to an edelbrock fuel pump i believe (may have
been a holly).  the pump cost about 90$ and keith swears it works just as
well.  i believe there are a few listers who have done it with great
success.  i differ with ingo on the grime comment.  grime does not just
appear over nite.  he is right that it messes with the fuel pumps ability to
suck, but when a pump starts making a lot of noise, it is done for.  the
grime has been there for quite some time.  when u clean out the tank to get
rid of the grime, i would suggest an oil extraction pump for the auto store.
works really well.  just make sure all the gunk has settled before u pump it
out.


Shayne

PARTING:  1972 Mercedes Benz 280 SE 4.5
PARTING:  1986 Audi 4000 CS quattro



> 
> Gunter,
> 
> I really don't see a difference between the two pumps except that the revised
> pump from Audi is smaller and requires a revised cage. IME a noisey pump is
> usually due to contaminants/debris in the built-in screen of the pump rather
> than actual pump failure. Kind of like a clogged drinking straw. Of course,
> this causes the pump to work that much harder and will hasten its demise. Good
> luck. And try to have as little fuel in your tank as possible before changing
> out the pump. 
> 
> Ingo Rautenberg
> 

> 
> 
> One of my '90 V8's fuel pump just started to make substantially more noise
> today.  Car has about 180 000 miles on it....to the best of my knowledge pump
> has never been changed.  Pump was previously slightly audible.....now it is
> clearly audible...it is worrisome.  Performance of car seems unchanged.  The
> noise became noticeable at the end of a lengthy day trip totalling about 200
> miles.  I changed the fuel filter several months ago.
> 
> My questions to other listers:
> - how long have I got before it fails completely?
> - What are common signs of failure?
> - There seem to be two available through online suppliers....one's a
> Bosch....the other a Pierburg......will both work?....anyone out there have an
> opinion on which one is better?  Should I buy dealer supplied instead?
> 
> Thanks
> Gunter
> (2) 1990 Canadian V8's (automatics)