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

Sat Jun 29 11:04:15 PDT 2013

I don't see any of what is below happening from just changing the injectors.

Is fuel coming out of the injectors? Is there a difference between old tired injectors and brand new one's fuel flow. Could your fuel pump be weak?

On Jun 29, 2013, at 12:54 PM, Fred Munro <munrof at sympatico.ca> wrote:

> Chris;
> 
> Which timing marks were checked? If you are checking the crankshaft pulley
> mark and the cam pulley mark, that only means that the timing belt hasn't
> jumped. The only marks that matter are the mark on the flywheel (for TDC)
> and the cam pulley mark.
> The crank pulley on these I5 engines has an integral key as part of the
> casting. The cast key is not very robust and is only intended to locate the
> pulley on the crank, not hold it in position. The pulley is held in place by
> the tremendous torque on the crank bolt (around 330 ft.lbs if I recall
> correctly). If the bolt loosens off or isn't torqued enough, the crank
> pulley can rotate on the crank and will shear off the key. The timing marks
> on the crank pulley and the cam pulley will still line up if the timing belt
> hasn't jumped, but the cam will not be timed correctly because the crank
> pulley is no longer in the correct position on the crank. Lining up the TDC
> mark on the flywheel to put the engine at TDC will reveal the cam timing
> problem because the cam pulley mark won't line up (nor will the crank pulley
> mark, which tells you that the crank pulley has shifted).
> I have come across one I5 engine with no mark on the flywheel - if this is
> your case you will have to manually find TDC on cylinder #1 by checking the
> piston position through the spark plug hole. 
> 
> How does your mechanic know that it was coolant he was seeing and not
> unburned fuel or the oil that was put in the cylinders to try to restore
> compression? Did he extract a sample? If the car was starting and running
> fine before you started the injector replacement I doubt that it would blow
> the head gasket just sitting there while you replaced injectors. It sounds
> like you haven't had the car running since you did the work.
> 
> Good luck!
> 
> Fred Munro
> '97 S6
> -----Original Message-----
> From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
> Behalf Of Christopher Gharibo
> Sent: Friday, June 28, 2013 10:41 AM
> To: Steve; quattro at audifans.com
> Subject: Re: '91 100q 5 injectors replaced - now car wont start
> 
> Tried oil in the spark plug hole to no avail. Timing marks are lined up.
> 
> My mechanic advised that he thinks he is seeing coolant in 3 spark plug
> holes.
> 
> I am baffled. Everything else in this car is in great shape.  
> 
> I am about to part this thing out or just sell it as is. It's in Northern
> NJ.
> 
> Any other advice?
> 
> ------ Original Message ------
> Received: Thu, 27 Jun 2013 06:42:38 PM EDT
> From: Steve <phixxitt at yahoo.com>
> To: Christopher Gharibo <cgharibo at usa.net>, Cody Forbes <cody at 5000tq.com>Cc:
> "quattro at audifans.com" <quattro at audifans.com>,  Christopher Gharibo
> <cgharibo at usa.net>
> Subject: Re: '91 100q 5 injectors replaced - now car wont start
> 
>> I agree with the washed down cylinder wall theory. RX7s are famous for
> this.
> I had this happen on an FC that I had that required removing the fuse for
> the fuel pump and then squirting ATF in the cylinders and spinning the
> engine with the starter to get compression back. 
>> 
>> The motor sounded like a timing belt had broke and it spun fast with 
>> no
> compression before I did the fuse/ATF thing.
>> 
>> I wonder if your injectors are spraying more gas than they should 
>> causing
> the cylinder wash...
>> 
>> 
>> 
>> 
>> 
>> --- On Thu, 6/27/13, Cody Forbes <cody at 5000tq.com> wrote:
>> 
>> From: Cody Forbes <cody at 5000tq.com>
>> Subject: Re: '91 100q 5 injectors replaced - now car wont start
>> To: "Christopher Gharibo" <cgharibo at usa.net>
>> Cc: "quattro at audifans.com" <quattro at audifans.com>, "Christopher Gharibo"
> <cgharibo at usa.net>
>> Date: Thursday, June 27, 2013, 5:32 PM
>> 
>> I stand by the mention of possible washed down cylinders. Squirt some 
>> oil in
> each cylinder and see if compression improves.
>> 
>> -Cody Forbes (mobile)
>> 
>> On Jun 27, 2013, at 4:57 PM, "Christopher Gharibo" <cgharibo at usa.net>
> wrote:
>> 
>>> He just texted me that the TB marks line up. 
>>> 
>>> Doubts somethink keeping valves open and say there is little or no
> compression
>>> in all 5 cylinders. 
>>> 
>>> ------ Original Message ------
>>> Received: Thu, 27 Jun 2013 02:38:05 PM EDT
>>> From: Tony Hoffman <auditony at gmail.com>
>>> To: Christopher Gharibo <cgharibo at usa.net>Cc: jlagnese at massed.net, 
>>> quattro at audifans.com
>>> Subject: Re: '91 100q 5 injectors replaced - now car wont start
>>> 
>>>> Nope, but a skipped timing belt can. THe one thing never stated in 
>>>> this thread is if the timing marks line up. I know I've suggested 
>>>> it at least once, that is key, If the TB is still turning the cam, 
>>>> but jumped teeth, you will have compression issues. Start with the 
>>>> basics, they only take
> a
>>>> second to check!
>>>> 
>>>> Tony
>>>> 
>>>> On Thu, Jun 27, 2013 at 1:18 PM, Christopher Gharibo
>>> <cgharibo at usa.net>wrote:
>>>> 
>>>>> Injectors appear to seat well, but they did seat rather easily. 
>>>>> Can a
>>> poor
>>>>> injector seal lead to no compression?
>>>>> 
>>>>> I used the seals from autohaus.
>>> 
>>> 
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