Re: Fuel pump questions

[Raymond Park <rpark@freimark.com>]

I have the same sound coming from my 1990 80Q.  I have had the sound for
about a year now and yes it does get louder as the temps drop.  To allay
your worries, my quattro has been running fine even though there is that
annoying whizzing sound.

Did you have that same noise on your hold fuel pump?

By the way, how much it to replace the pump - parts and the labor.


At 11:13 AM 11/18/98 +0100, Aleksander Mierzwa wrote:
>Hi List,
>
>I have a problem with my recently replaced fuel pump (new Bosch unit). At
>the beginning, it was very quiet (one could barely hear it even from
>outside of car). Now, approx. 2 months later, it is getting louder - much
>louder. The sound is not the high-pitched "buzz-whine" the old worn pump
>was making, but rather a lower "howling" noise. This howling is accompanied
>with another, hard to describe, "screetching" sound. Both get somewhat
>quieter as the car warms up, but nonetheless, it's easily audible over the
>engine noise at idle. The noise is also "fluctuating", eg. it constantly
>changes the pitch and volume, sounds like an electric motor with worn
>bearings (???). So, my questions are:
>1) Is it normal and I should live with that?
>2) The pump was very quiet when it was about +10 degrees Celsius outside.
>Now the temperature dropped to about -2. Is the pump supposed to be louder
>when it's cold outside?
>3) Could I make any mistakes during installation that caused the pump to
>get louder soon after? The job went smoothly.
>4) Is it posssible that the pump is currently just breaking in and it will
>get quieter over time (I only made something like 500 miles since I
>replaced the pump)?
>As usual, any input appreciated. TIA
>
>Aleksander Mierzwa
>Warsaw, Poland
>mailto:alex@matrix.pl
>87 Audi 5000CS turbo (mine)
>88 Renault Medallion wagon (mom's)
>91 mountain bike (just in case both cars broke at the same time :-)
>