CIS Problem?--AGAIN!!!--SOLVED!!!

[Ben Swann]

I suspect the pump may have failed in part to ingesting some debris in the
tank, but may have indeed been a dud.

I relay mine with 30Amp fuse.  Connection is under the seat as I recall.  The
fusebox wiring should not be passing the kind of current that a fuel pump will
draw.

Ben

-----Original Message-----
From: L DC [mailto:ldc007usa at yahoo.com] 
Sent: Tuesday, December 26, 2006 2:09 PM
To: Ben Swann; 'Cody Forbes'
Cc: quains at sbcglobal.net; quattro at audifans.com
Subject: RE: CIS Problem?--AGAIN!!!--SOLVED!!!

Thanks Ben and I agree with you.

Now get a load of this.

Upon closer inspection, the 15 AMP fuel pump fuse
failed to do its job- it never blew up as supposed to
when the NEW fuel pump shorted. 

Instead, the fuse bubbled up and got cloudy in the
area where the break is supposed to occur. I was with
my brother and a neighbor when it happened so they let
me know about the smoke and I quickly let go of the
ignition.

The surrounding plastic in the fuse box to which the
fuel pump fuse connects also got just a tad fried, but
you have to really look for it to really notice it. It
can be dismissed as simple wear of the fuse on the
surrounding plastic.

I still have :)

I guess is just my luck, if is going to happen, it
will happen to me.

1. Brand new fuel pump going bad after 45 minutes of
use.

2. Fuse failing to do its job and instead melts to
smoke. 

The bright side?

Now I can literally R&R the fuel pump on the 5KTQ with
my eyes closed :)

-Regards

Louis


--- Ben Swann <benswann at comcast.net> wrote:

> You absolutely need to relay the fuel pump - A fuse
> on the power lead to the
> pump should blow rather than smoke coming from the
> fuse box.
> 
> Ben
> 
> http://www.gtquattro.com
> 
> -----Original Message-----
> From: L DC [mailto:ldc007usa at yahoo.com] 
> Sent: Tuesday, December 26, 2006 11:33 AM
> To: Ben Swann; 'Cody Forbes'
> Cc: quains at sbcglobal.net; quattro at audifans.com
> Subject: RE: CIS Problem?--AGAIN!!!--SOLVED!!!
> 
> Took some time to sort out but finally found the
> culprit on the NO start issue with my '86 5KTQ,
> which
> thought is was related to CIS.
> 
> It turned out to be a bad fuel pump even though I
> had
> installed a BRAND NEW one to begin with to fix the
> problem.
> 
> Car literally ran less than 5 miles and some 35
> minutes at idle to check for leaks.
> 
> When I went to start the car 3 days later, all I got
> was a spark and smoke emanating from the fuse box in
> the rain tray.
> 
> I dismissed being a fuel pump problem for long since
> I
> had installed a NEW pump and went on to checking the
> wiring harness leading to the pump. The car always
> started with starting fluid so new it was not a
> matter
> of spark/timing or air.
> 
> At times, the car would get power to the pump and at
> other times it wouldn't (now I know it was because
> the
> fuel pump kept on blowing off fuses, but not every
> time I attempted to start the car, weird). 
> 
> That led me to believe the wires were shorting out
> perhaps due to a kink in them somewhere along their
> path.
> 
> Again, I did not think of the fuel pump being the
> culprit for the already stated reason.
> 
> To find out for sure if the problem was in the
> wiring
> harness, Cody suggested applying direct power to the
> fuel pump in this case by using the power source
> from
> the trunk's little light.
> 
> Pump did nothing.
> 
> I removed the NEW fuel pump and installed a spare
> one
> I had gotten at the junk yard a while back and
> VOILA!!!
> 
> Then engine fired right up!!!
> 
> I was still applying direct power via the trunk's
> lighting.
> 
> The next day, I checked the fuse box and noticed the
> fuel pump fuse was blown out yet again, due to the
> previous pump. I replaced the fuse, hooked the
> wiring
> harness back on they way it should be and again the
> engine started right up. I have started the car many
> times since with no problem so far.
> 
> I got 2 leaks to deal with now, one from one of the
> power steering hoses connection and the other from
> the
> oil hose that runs from turbo to oil cooler.
> 
> I want to thank Cody, Ben, Huw, Denis, Kent and all
> others who pitched in to help solve the no start/CIS
> problem.
> 
> -Happy Holiday
> 
> -Louis
> 
> 
> --- Ben Swann <benswann at comcast.net> wrote:
> 
> > Yes - watch them weep.  Have a set on hand  - Plan
> > on replacing them when you do this so as to not
> have
> 
> > to pull them twice.
> > 
> > The Quantum injectors will not work.
> > 
> > Break down and buy new injectors.  This is a
> penny-
> > wise pound foolish using old injectors in these. 
> I 
> > have even seen some relatively new ones be bad.
> > 
> > I said the same thing when I owned my first
> 5ktq's. 
> > Then I found I was wasting more time on diagnosing
> 
> > than just to replace them outright.  If you know 
> > they are not nearly new - do it!
> > 
> > Ben
> > 
> > -----Original Message-----
> > From: L DC [mailto:ldc007usa at yahoo.com] 
> > Sent: Tuesday, June 27, 2006 5:02 PM
> > To: Ben Swann; 'Cody Forbes'
> > Cc: quains at sbcglobal.net; quattro at audifans.com;
> 'Ben
> > Swann'
> > Subject: RE: CIS Problem?--AGAIN!!!
> > 
> > Thank You Cody and Ben.
> > 
> > Ben wrote:
> > 
> > >I know in theory - the fuel leaked into your
> engine,
> > > but that leaked fuel is now condensed on the 
> > > manifold, and the line pressure has leaked down.
> > > Therefore no spray.  It can take 10-15 seconds
> of
> > > cranking to get them charged up again.
> > 
> > So, can I test for leaky injectors, by, say,
> pulling
> > and placing them in a receptacle to collect any
> fuel
> > sprayed while cranking engine and then let them
> sit
> > and see if they leak (provided I crank engine long
> > enough to build pressure if none there) ?
> > 
> > Yes, pulling them can be a PITA, even when using
> the
> > appropriate tool and big ass screw drivers, as I
> > found out when I did that job on the head rebuilt
> of
> 
> > my VW QS. The O-rings had "crystallized" and were
> not
> > pliable as rubber should.
> > 
> > I have a complete set of used but good injectors
> > from an '87 VW Quantum Syncro which share the same
> 
> > drive train as the Audi 4KQ.
> > 
> > I assume they're similar injectors as the ones in
> the
> > 5KTQ, so I could swap them to see what happens? 
> > 
> > I'm not trying to be cheap or anything, but I
> don't
> > want to go and spend more on new injectors unless
> > certain that's the culprit.
> > 
> > Thank you all again!!
> > 
> > -Louis..in South FL where it's been raining on and
> 
> > off just about everyday for the past month,
> reventing
> > him to open the hood and get to the bottom of it
> > all. 
> > 
> > 
> > --- Ben Swann <benswann at comcast.net> wrote:
> > 
> > > Not sure what the specific question is.
> > > 
> > > As I mentioned, old leaking injectors can and
> will
> > > cause hard starting.  I have had this problem on
> > > just about every 5kTQ that I have owned or
> worked
> > > on and other CIS cars as well.  Usually among
> the
> > > contributing reason folks get rid of the cars. 
> > One thing leads to another and the leaking
> injectors
> 
> > > causes a domino effect on things -too much draw
> on
> 
=== message truncated ===


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