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

[John Lagnese]

Check the rotor first, then do a compression check.

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Christopher Gharibo
Sent: Friday, July 05, 2013 10:39 AM
To: quattro at audifans.com
Subject: Re: '91 100q 5 injectors replaced - now car wont start

I just got the 100q towed back to me. This is my opportunity to learn the
inner-workings of the engine. 

It's upsetting that local repair shops do not take my '91 audis (CQ & 100q)
seriously. They're in great shape. I hope doctors don't behave this way to
their older patients. 

I will report back and thanks to everyone. 

------ Original Message ------
Received: Wed, 03 Jul 2013 09:25:10 AM EDT
From: Joshua Van Tol <josh at spiny.com>
To: Christopher Gharibo <cgharibo at usa.net>Cc: Quattro List
<quattro at audifans.com>
Subject: Re: '91 100q 5 injectors replaced - now car wont start

> Christopher,
> 
> Something that happened to me a long time ago is nagging at my memory.
> Since others have pointed out that this is a non-interference engine, the
> problem basically has to be one of these things:
> 
> 1.) The cam/crank timing is off. This could be caused by a broken keyway
on
> the crank gear. This isn't likely, but possible.
> 2.) You have debris from the injector shrouds caught in several intake
> valves. This should eventually clear with extended cranking as the bits
and
> pieces get mashed up.
> 3.) Last but not least (this is the one that happened to me) the hydraulic
> lifters could have bled down. This will result in the valves not opening.
> When this happened to me, the car sat for a month with the nose up.
> Something about this allowed the lifters to bleed down. I had to crank it
> forever to get it to start, before it started, and for several minutes of
> cranking it had no compression. Compression gradually returned, it fired
on
> a few cylinders, and then ran, with lots of lifter noise. It took 20
> minutes or more to get the lifters re-primed. On that note, the car does
> have oil in it right? Because if you drained it and forgot to replace it,
> then there would be no oil to be pumped into the lifters to re-prime them.
> 
> My suggestion: Check the oil, make sure the battery is fully charged, and
> crank the heck out of it, you should probably pull the fuel pump relay so
> you don't foul the plugs. See if anything changes. If that doesn't work,
> pull the valve cover, and see if the lifters are mushy, and report back to
> the list.
> 
> I hope this is helpful to you. I really think this is a simple fix, as
> others have opined.
> 
> 
> On Wed, Jul 3, 2013 at 5:24 AM, Christopher Gharibo
<cgharibo at usa.net>wrote:
> 
> > Huw,
> >
> > My mechanic wants the car to go away. No doubt.
> >
> > I am getting the car towed back to me and haven't given up. This was a
> > great no-worry car for errands.
> >
> > I lack knowledge and experience re many of the suggestions.
Nevertheless,
> > I will go through many of the suggestions and report back with hopefully
> > the culprit and the good news.
> >
> >
> > Begin forwarded message:
> >
> > > From: quattro-request at audifans.com
> > > Date: July 3, 2013, 12:03:56 AM EDT
> > > To: quattro at audifans.com
> > > Subject: quattro Digest, Vol 117, Issue 6
> > > Reply-To: quattro at audifans.com
> > >
> > > Message: 5
> > > Date: Tue, 02 Jul 2013 22:03:25 -0400
> > > From: Huw Powell <audi at humanspeakers.com>
> > > To: quattro at audifans.com
> > > Subject: Re: '91 100q 5 injectors replaced - now car wont start
> > > Message-ID: <51D3866D.4060003 at humanspeakers.com>
> > > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> > >
> > >
> > >
> > > On 7/2/2013 8:16 PM, Christopher Gharibo wrote:
> > >> 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?
> > >
> > > No.
> > >
> > > Your mechanic is either incompetent or simply wants this car to go
away.
> > _______________________________________________
> > quattro mailing list
> > http://www.audifans.com/mailman/listinfo/quattro
> > http://www.audifans.com/kb/List_information
> >
> 


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