'91 100q 5 injectors replaced - now car wont start

[urq]

As others have noted on your engine there is little to no chance that a leak
in the intake tract due to injector seals will affect compression inside the
cylinders.  

One fact about all the rest of our kibitzing on this is that we can't see or
hear what is going on, so there may be some key item of which we are all
unaware.  There is one principle you should use to guide your investigation.
The car was running before you had it worked on and it is not afterward.
The chances are very good that the problem is a result of *something* that
was done and is not some random, unrelated failure.  Don't focus so much on
the injector seals ... did the mechanic do anything else at the same time?
Did they disconnect something during the process and forget to reconnect it?
Could there have been some sort of accidental damage?  Blown fuse perhaps?
Mind you, I would be extremely skeptical that this is the result of a blown
fuse ... just trying to expand the range of possibilities ... 

Are you positive that the engine not starting is a result of low
compression?  Has your mechanic told you what the compression numbers are
for all cylinders?  Was the compression test done with a fully charged
battery with the throttle at WFO?  Create a list of what has been checked
and what you know, so that you don't waste a lot of time exploring theories
you have already dismissed.  Start with the basics that the engine needs to
run ... 

It seems to me that you are someone who is interested in understanding
better what is going on under the hood of your car but has not had much
opportunity to learn.  If that is the case I'd recommend that you get a copy
of the Bosch Automotive Handbook and read through sections on how an
gasoline internal combustion engine like yours operates.  As someone else
noted, it would also be good for you to find a local mentor.  

Good luck!
Steve Buchholz

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Christopher Gharibo
Sent: Tuesday, July 02, 2013 5:17 PM
To: quattro at audifans.com
Subject: Re: '91 100q 5 injectors replaced - now car wont start

I am thinking about going through the injector installation and the
suggestions again. This car was running little rough, stalling at idle, but
otherwise running fine before it underwent the injector replacement. 

Can a poor seal between the injector-shroud or the shroud-engine cause loss
of compression on a particular cylinder and loss of cranking cycle?

Maybe I was sent the wrong gaskets by the parts supplier.

Thanks for all the help!

------ Original Message ------
Received: Tue, 02 Jul 2013 03:02:59 PM EDT
From: TonyEscobedo <TonyEscobedo at hotmail.com>
To: Steve B <urq at pacbell.net>Cc: Project Pat <psdooley at verizon.net>,
audifans list <quattro at audifans.com>, Christopher Gharibo <cgharibo at usa.net>
Subject: Re: '91 100q 5 injectors replaced - now car wont start

> Dang!! I had money on it being a weak fuel pump
> 
> On Jul 2, 2013, at 2:39 PM, Steve B <urq at pacbell.net> wrote:
> 
> > Perhaps your expectations are set a bit high ...
> > 
> > From what I've seen in my 30 years on audifans is that sometimes in 
> > the
end you chalk it up to ... who knows!?  When I offer my tuppence it is in
the hopes that someone else can get their car running and that should I be
put in a similar situation at some point that the folks here will be
helpful.
> > 
> > Paying a mechanic to solve a problem on a 20 year old car doesn't 
> > take
long to exceed the value of the car, so I'm not going to complain when
someone decides to cut their losses.  In fact my thinking would be more in
line with offering condolences.
> > 
> > I have been following this thread for some time now, and agree that 
> > it is
likely to be something that isn't expensive to fix if you want to figure it
out for yourself.  Maybe what you should do is to buy the car, find the
problem and report back what you found.  From the sound of things the car is
in good condition otherwise ...
> > 
> > Steve Buchholz
> > 
> > 
> > Project Pat <psdooley at verizon.net> wrote:
> > 
> >> The mechanic didn't tell you anything?  
> >> Now you want to use the list to unload the carcass?
> >> 
> >> I gotta say it's frustrating to offer help and read all this banter 
> >> and
in
> >> the end get nothing regarding useful information on what actually
happened.
> >> 
> >> Sorry to hear about your car, but at least give a little back to 
> >> the
people
> >> that spent their time trying to help you.
> >> 
> >> -----Original Message-----
> >> From: quattro-bounces at audifans.com 
> >> [mailto:quattro-bounces at audifans.com]
On
> >> Behalf Of Christopher Gharibo
> >> Sent: Tuesday, July 02, 2013 11:47 AM
> >> To: <quattro at audifans.com>
> >> Subject: Re: '91 100q 5 injectors replaced - now car wont start
> >> 
> >> I am sad to say it, but the engine appears to have died in my 100q. 
> >> 
> >> Lots of good parts or make an offer on the whole car. AC works. New 
> >> headliner. Original windshield. Just about everything works. I'll 
> >> be
putting
> >> it up in Audi fans. 
> >> 
> >> 
> >> 
> >> _______________________________________________
> >> quattro mailing list
> >> http://www.audifans.com/mailman/listinfo/quattro
> >> http://www.audifans.com/kb/List_information
> > _______________________________________________
> > quattro mailing list
> > http://www.audifans.com/mailman/listinfo/quattro
> > http://www.audifans.com/kb/List_information
> > 


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