More on 1995 A6Q ignition switches and (lack of) fuel

[Grant]

You seem to have it right.  What I called accessory should rightly ( as 
you point out) be called "run".
I was not, or at least not always, hearing the fuel pump operate when i 
turned it to run.  But that's certainly nto the end of it, since the 
fuel pump was clearly, as evidenced by the DVM, [intermittently] not 
getting power during cranking either.

By the way, the problem will nto recur within an hour or two. but 
overnight, etc. is a problem.

And finally, yep, B5 is a force of habit from my (ex) '00 S4.  It is 
indeed a C4.

Thanks in any event, and drop a note if you think of anything. I seem 
to be closing in on it, btu am not yet "there".

Grant

On Nov 13, 2005, at 7:05 PM, chris wrote:

>> Now it starts consistently, but will stall out if it has not run 
>> recently. Oddly, given my note above, if you leave the switch in 
>> accessory for a few seconds and then start it, it runs fine and will 
>> not quit/stall.
>>
> This last bit sounds like the fuel pressure is being lost when the car 
> is turned off.  When you turn the key from off to run, the pump should 
> run for about 2 seconds in order to pressurize the fuel system.  It 
> actually sounds like you've got more than one problem which is making 
> it hard to diagnose.  If I were you, I'd try checking how long the 
> fuel system stays pressurized after you shut the engine off.  Someone 
> correct me if I'm wrong, but I think the pressure should hold for at 
> least an hour or two.
>
> Just a side note, your '95 A6Q is a "C4" not a "B5", at least in the 
> US.  Also, I don't think the '95 A6Q has an accessory position (at 
> least my doesn't -- it just has off, run, and start).
>
> -Chris
>
> '95 A6qm