84 4KSQ/88 5KSQ Fuel Pump Interchange

[gwbutler]

Hello All,

Please accept my belated best wishes for you, your families, and your Audis
for 2002.  I have a quick scenario/question for any BTDT's and other
knowlegeable folk.  My sons 88 5ksq:

1. Has been experiencing a progressively louder whine/buzz from the fuel pump

2. Takes an extremely long time to get up to speed (it's "fine over 40 mph but
even that is getting worse"

The rub:

I have a used known good Bosch fuel pump from an 84 ksq sitting in the cellar
and I need to know if it's interchangeable with the 88 5ksq before ordering
one from Blau (and before laying out on my icy driveway looking for the
numbers on the 88 5ksq fuel pump).  Any info/advice? TIA

Regards,

George B.
Massachusetts (Brrrrrrrr)
84 4ksq
88 5ksq by default.. ;)