[urq] intermittent ignition cutout, tach drops to zero

[Ed Kellock]

LOL.  When I acquired mine, the glove box was in the trunk and the ecu
was just hanging against the kick panel and partially resting on the
floor.  I finally remounted everything before they Park City urq
gathering.  I even still had the plastic cover off of the connector
plug from back when I was troubleshooting, pin by pin, the no-start
condition 2 years ago.  When I replaced the cover and then plugged it
back into the ecu and clipped it down snug, the car would not start. 
I had (have?) a flaky pin and had to remove the plug cover and make
sure the wires weren't streched or pinched and was finally able to get
it back together and have the car actually run (bonus!).  I think it
may have been the pin/wire to the ignition module.  Aha! you say...
but I'm sitting here saying "but I didn't work in that area at all!"

I guess I'm going back under the dash.  I know there had been issues
before I bought it because there were jumper wires run in different
places, from the fuse box to the coil, from the fuse box to something
or other under the driver's side of the dash, from the ignition module
to another wire on the ecu loom.  All since removed and everything has
been fine.  And... I didn't work in that area at all!

Irascible bitchcar from hell.

Ed


On Tue, 15 Feb 2005 12:55:10 +0000, fdekat <fdekat at sentex.net> wrote:
> 
> I too had such a similar problem on my '83 urq.
> 
> I've not really 'solved' the problem, but have managed to make the symptoms
> go away.
> 
> I would get the same tach action, or sometimes it would bounce all over the
> place. And if the 'event' happened under good boost, I'd get a most
> spectacular loud 'BANG' out the rear. Sort of fun, the first few times. Gets
> pretty tired after a while.
> 
> Anyway, if it didn't fix itself, it could be cured by a key off/on cycle
> (even 'on the fly' on the highway).
> 
> Eventually, it started to happen when hitting good bumps, and I could
> 'simulate' the condition by beating on the right end of the dash. I've
> 'fixed' it by mounting the ECU back onto the glovebox end, as it was intended
> to be.
> 
> (When I got the car, the ecu was sort of hanging on the end of a tiewrap, up
> behind the glovebox.)
> 
> I was convinced that it was a flaky connection, but no amount of prodding at
> the ECU connector, or moving it around could reproduce the fault. I'm
> thinking that perhaps something on the ECU itself is the problem, but have
> not really pursued the issue further, as it 'seems' to be ok now.
> 
> (OK. So I'm an optimist! Who am I really fooling? The Audi gods will strike
> when they see fit!)
> 
> Regards,
> 
>  =Frank de Kat=
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