Re: How to Change Fuel Filter ('88 5KSQ)

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <19990406213737.29514.qmail@hotmail.com> "Christopher Ritchie" writes:
> The Bentley does not provide any instructions on how to change the fuel
> filter on my 1988 5000S Quattro.  Do I just unbolt it, and catch the
> spraying gasoline as best I can?  Or, is there a recommended procedure
> whereby the engine is run with the fuel pump disabled (pull the fuse),
> thereby depressurizing the system and emptying the filter?

I can only describe my own approach.  I've given up on Crowfoots and
standard wrenches for fuel lines - I use two Bahco adjustables.  These
I place on the joint concerned, and wiggle while turning the tightening
screw.  Then I shout: "Eyes closed", close my own, and open the joint.
If I know the car has a good accumulator, I usually wrap an old towel
round the joint first.

After re-assembling, follow the "Output Diagnostics" instructions on
Scott Mockry's page ( http://www.teleport.com/~scottmo ) for the
5000 ECU.  The first such "output test" uses a fuse in the fuel pump relay
to run the fuel pump - let it run for fifteen seconds or until an
audible ticking from under the rear of the car abates.

Incidentally - for those plagued by warm starting problems - the "output
diagnostics" guarantee an instant start.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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