Return of the No-Start 4kq

[Jim Dupree]

Fuel Pump relays on these cars would be my first suspect. I would not
suspect the pump of starting to fail and taking out the relay until I had a
second relay fail. I have had many of these relays apart and the solder
joint to the circuit board for one of the main connectors cracks. I have
resolderd them and they work but I would not trust them long term. I have
several in my tool box I keep for testing or spares. I even added red, green
and yellow LED's to one so I could tell if it was getting battery power,
ignition power and ignition signal. Made for a neat little tester except it
is hard to see while sitting in the car and cranking it over.
NOTE: The 4 cylinder CIS-E relay looks the same as the 5 cylinder relay and
it will work in a 5 cyl car up to a point. The fuel pump relay is the rev
limiter and a 4 cylinder relay will give you approx 20% lower RPM limit.
Make sure you get the correct relay.
Take Care
Jim

----- Original Message ----- 
From: "Huw Powell" <audi at humanspeakers.com>
To: "Kneale Brownson" <kneale at coslink.net>
Cc: <quattro at audifans.com>
Sent: Tuesday, June 21, 2005 9:47 PM
Subject: Re: Return of the No-Start 4kq


> > I jumpered the fuel pump relay today and the pump runs.  So I put the
relay
> > back in and the car started OK.  When I had similar experiences with my
> > 200q20v, I ended up having to replace the relay and then having the pump
> > fail a few weeks later.  My surmise was that the pump going out caused
the
> > relay to fail.  Should I expect the same here?
>
> There's really no way of knowing - although I suppose you could measure
> the current draw and flow output of the pump and see if you can find
> specs to compare your measurements to.
>
> >  Should I get all the pump
> > "fixings" ala Huw's report on renewal of his system and prepare to
replace
> > everything on the fuel pump tray?
>
> That depends - is this a car you keep trying to make better and cleaner
> everytime you work on it, or one that is headed to becoming a beater?
>
> - pump - well, this is why you'd be in there, so yes.
> - The tray - shouldn't "need" replacement, coat of paint can be nice.
> - the molded plastic lines - good idea to have on hand in case their
> fittings break.
> - pressure accumulator - can be a hunk of rust and still work fine.
> - filter - no brainer unless it was new last week
> - half dozen or so rubber mounting bushings - any old ones that aren't
> broken will break as you undo them.  try to get all.
> - various bits of bracketry - like the tray, a bit of a "flash" luxury,
> but I think they're all available new.  Or nice ones can be had from
> non-rust belt parts cars?
>
> > What relay can I use for the 4kq?  The
> > contacts configuration on my spare 200 relay is different from the one
on
> > the 4kq.
>
> That's because, um, they are different.  Any of the n/a CIS-E cars
> should have a compatible fpr on board, or you can find new ones for
> about $40 I think.  Sorry I don't have a p/n for you...
>
> -- 
> Huw Powell
>
> http://www.humanspeakers.com/audi
>
> http://www.humanthoughts.org/
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