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

Steve phixxitt at yahoo.com
Fri Jul 5 17:19:21 PDT 2013 

On rx7s the procedure is:

Disable fuel pump

and a thimble-full of ATF to each plug hole.

run a few cycles with plugs out.

put plugs back in and cycle some more.

if
 motor cranks with normal compression put fuse/relay back in for pump 
and listen to the sweet sound of your motor running for a sec.

Then stop and change the oil before something bad happens.(maybe do this step first in your case)




--- On Fri, 7/5/13, Grant Lenahan <glenahan at vfemail.net> wrote:

From: Grant Lenahan <glenahan at vfemail.net>
Subject: Re: '91 100q 5 injectors replaced - now car wont start
To: "Cody Forbes" <cody at 5000tq.com>
Cc: "<quattro at audifans.com>" <quattro at audifans.com>, "Christopher Gharibo" <cgharibo at usa.net>
Date: Friday, July 5, 2013, 7:38 PM

Agre with everything here.  Thinning of oil from cranking is so impossible!

Oil thins from heat and you have almost none

Grant
On Jul 5, 2013, at 7:06 PM, Cody Forbes wrote:

> Normally I would approach this much more carefully, but since you already cranked it quite a lot if damage were to be done it already would have happened. Since it sputtered and now sounds like its pumping I'm still sucking with dry cylinder walls. Maybe the mechanic lied about testing with some oil or maybe he didn't use enough, who knows. This is the thing that makes the most sense by far on an engine that ran fine, then sat for a while, and suddenly has low compression. 
> 
> I say charge the battery and try starting again. Do give the starter a rest between attempts so it can cool off. Some ether/starting fluid may be a good idea to get it to fire up long enough to build oil pressure.
> 
> Oil won't "thin out" from lots of cranking. If the engine is dumping tons of fuel in that would thin it out, but if it sputtered that is unlikely to have occurred because the plugs would be fouled long before the oil thinned. Change the oil after you get it running.
> 
> -Cody Forbes (mobile)
> 
> On Jul 5, 2013, at 5:04 PM, "Christopher Gharibo" <cgharibo at usa.net> wrote:
> 
>> The distributor rotor is turning with the engine. There are sparks in the
>> distributor cap while the engine is turning. 
>> 
>> I put the distributor cap back and proceeded to perform extended cranking.
>> After about a minute or two the engine started to catch and crank semi normal
>> but did not start. The engine literally started to make pumping sounds. By
>> this time, the battery was almost dead and is now recharging. 
>> 
>> The oil level is fine but I think it has thinned quite a bit from all the
>> cranking. What should I do now? Will the thinned oil be a problem? Should I
>> put thick oil in there?
>> 
>> I am excited. Thanks.  
>> 
>> ------ Original Message ------
>> Received: Fri, 05 Jul 2013 03:15:46 PM EDT
>> From: "John Lagnese" <jlagnese at massed.net>
>> To: "'Christopher Gharibo'" <cgharibo at usa.net>,    <quattro at audifans.com>
>> Subject: RE: '91 100q 5 injectors replaced - now car wont start
>> 
>>> 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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>>> 
>> 
>> 
>> 
>> 
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