[20v] Intermittent no spark condition - 1989 Audi 90Q

Christofer Wiik Christofer_w at hotmail.com
Thu Dec 4 13:27:34 PST 2008


Hi.

I had the same thing with an 82 Gt coupe. After about a year of driving 
around, and my nerves shot i found what was my problem. There was an hall 
sensor on the dizzy. This was corroded and loose. In the end. One of the 
wires fell of and that was when i could track the problem down. So i would 
look that way.
I ended up replacing the whole dizzy because there was no way in hell i 
could fit it together again (no fixing/splitting yourself if your not an 
expert i would say).
Have you tried just hooking up another coil? Doesnt really sound like a coil 
problem, since its so intermittant, but its very easy to do. Just bring 
another coil with you in the car. I dont know about you guys, but i always 
have a coil or two in the garage just in case.

Christofer Wiik



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Sent: Thursday, December 04, 2008 9:00 PM
To: <20v at audifans.com>
Subject: 20v Digest, Vol 29, Issue 2

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>   1. 90q 20v swap (donald grady)
>   2. Intermittent no spark condition - 1989 Audi 90Q (J.B. Hebert)
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> Message: 1
> Date: Wed, 3 Dec 2008 19:18:25 -0400
> From: donald grady <audilvr at hotmail.com>
> Subject: [20v] 90q 20v swap
> To: <20v at audifans.com>
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> i have an 88 90q 10v. i have purchased a cq 20v for the motor and would 
> like to swap. i've never attempted a job like this and any advice would be 
> apreciated. i know the fuel system and the wiring/computer are different, 
> is there anything else to note?
>
> _________________________________________________________________
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> ------------------------------
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> Message: 2
> Date: Thu, 04 Dec 2008 13:12:28 -0500
> From: "J.B. Hebert" <jhebert at wrxtra.com>
> Subject: [20v] Intermittent no spark condition - 1989 Audi 90Q
> To: 20v list <20v at audifans.com>
> Message-ID: <49381D8C.6060003 at wrxtra.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
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> I have an '89 90Q that is giving me trouble.  Occasionally it will
> either fail to start or will die while driving.  Sometimes it can be
> restarted, and other times it cannot be.  When it will not restart, it
> cranks fine but there is no spark present at the coil or plugs.
> Inevitably, when I have it towed back to the shop (thank you AAA), it
> starts right up and I'm unable to reproduce the problem to
> troubleshoot.  I installed a known good coil/ignition module from
> another car, thinking that they might be bad, and the car was fine for
> several weeks.  Then the other night it died again on me and wouldn't
> restart.
>
> Does anyone have any ideas?  Is there an interlock that prevents spark
> when the fuel pressure is too low, like on some cars I've worked on?
> Could this be an issue with the alarm?
>
> Thanks in advance for any ideas.
>
> J.B. Hebert
>
>
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