No start. Audi 100

[suffolkd at aol.com]

I had similar ground issues on my MC1 powered Audi.

http://www.quattro123.com/4000VacuumLeaksandWires.htm

See if these work.  The IM ground was the killer and may be in your case.

- Scott

On Aug 28, 2011, at 3:00 PM, quattro-request at audifans.com wrote:
> Today's Topics:
> 
>   1. Re: No Start: Audi 100, 1990, I5 NF engine, non-turbo,
>      non-quattro,    CIS-E-111 (California) 
> 
> Message: 1
> Date: Sun, 28 Aug 2011 13:40:14 -0400
> From: Huw Powell <audi at humanspeakers.com>
> To: Marc Boucher <mboucher70 at hotmail.com>
> Cc: quattro at audifans.com
> Subject: Re: No Start: Audi 100, 1990, I5 NF engine, non-turbo,
>    non-quattro,    CIS-E-111 (California)
> Message-ID: <4E5A7D7E.70304 at humanspeakers.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> Thanks for putting all the details in one place!
> 
> I have two comments.
> 
> 1. In your list of ground checks you didn't mention the (2?) wires that 
> are grounded to a stud on the intake manifold.
> 
> 2. The logic that gets from your symptom and check list to "bad ECU" is 
> flawed, I think, since there are two ECUs as you note, one for fuel 
> (which also runs all that other junk you list), and one for ignition, 
> which only runs, well, the ignition.  Which one is bad?  Both?  Just 
> ignition (no spark would shut down the fuel system via the fuel pump 
> relay)?
> 
> Hmmm, wait on that, I may be assuming too much across platforms and 
> model years.  On my NG-engined 88/89 90Qs there are two physically 
> separate ECUs.  Is this not the case with your car?  Did they get around 
> to stuffing them into one box?
> 
> Anyway, you really should try to borrow another ECU to swap in if you can.
> 
> Good luck!
> 
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