[s-cars] Intermittent stall

[Duncan Thomson]

Thanks for the ongoing feedback folks.
Ignition switch was done recently, so not that. Have previously done the
POS spare channel swap, so I know what that feels like, and this is
different. I have had an occasional misfire under load too, so starting to
suspect ignition system may need a refresh. Wiring may be my first port of
call.

And thanks for the info Wylie. I want to stay in denial of ECU issues too,
at least until I can tick off a few of the easier / cheaper options!

On Wed, Aug 5, 2015 at 3:56 AM, theringmeister at triad.rr.com <
theringmeister at triad.rr.com> wrote:

> Unfortunately Jerry, it's not those chips. Apparently the ignition driver
> chip is a proprietary design and there's not a suitable replacement.
> It's not the ones that get replaced when 'chipping' the car.
>
> Sent on the new Sprint Network
>
> ----- Reply message -----
> From: "Jerry Scott" <jerryscott at wispertel.net>
> To: <theringmeister at triad.rr.com>, "'Tony Curran'" <
> tony.curran at sympatico.ca>, "'Duncan Thomson'" <thomson.duncan at gmail.com>,
> "'s-car list'" <s-car-list at audifans.com>
> Cc: "'s-car list'" <s-car-list at audifans.com>
> Subject: [s-cars] Intermittent stall
> Date: Tue, Aug 4, 2015 11:24 AM
>
> I still may have the chips that came out of my 93 when the Hoppen upgrade was done, and would only have a few thousand miles on them.  Would that help anyone?  I no longer have the car, so I don't need them.
> Jerry
>
> -----Original Message-----
> From: S-CAR-List [mailto:s-car-list-bounces at audifans.com] On Behalf Of theringmeister at triad.rr.com
> Sent: Monday, August 03, 2015 7:10 PM
> To: Tony Curran; 'Duncan Thomson'; 's-car list'
> Subject: Re: [s-cars] Intermittent stall
>
> Exactly my point, Tony. I did most of those things chasing my issue and spent a lot of needless money on things that weren't the culprit.... mainly because I didn't want to believe my ECU was the culprit.
>
> Sent on the new Sprint Network
>
> ----- Reply message -----
> From: "Tony Curran" <tony.curran at sympatico.ca>
> To: <theringmeister at triad.rr.com>, "'Duncan Thomson'" <thomson.duncan at gmail.com>, "'s-car list'" <s-car-list at audifans.com>
> Subject: [s-cars] Intermittent stall
> Date: Mon, Aug 3, 2015 8:07 PM
>
> There's a whole long list of things to investigate...
>
> POs,
> Coils,
> Ignition wiring,
> Ungapped spark plugs,
> Fuel pump,
> Fuel pump relay,
> O2 sensor,
> Vacuum leak,
> MAF - clean,
>
> Good luck
>
> Tony
> 96 S6
>
>
> -----Original Message-----
> From: S-CAR-List [mailto:s-car-list-bounces at audifans.com] On Behalf Of theringmeister at triad.rr.com
> Sent: August-03-15 7:16 PM
> To: Duncan Thomson; s-car list
> Subject: Re: [s-cars] Intermittent stall
>
> Depending on your affinity for internet forums, you may want to pose the question over on the QW (UrS car specific) forums. That said, I never had a complete stall at idle (that I recall) but I had a nasty 'hiccup' where my car would cut off for a split second and then be back running the next while driving. A lister was kind enough to loan me an ECU to swap in and sure enough that cured the issue. What I recall is that the ignition driver chips are failing and the cause. Steve Eiche has the lowdown but unfortunately there isn't a replacement chip out there.  If I were you I'd see if you can do the same with a known-good ECU. I did a whole lot of part swapping/replacing, only to find the ECU was the cause.
>
> Hope that helps
>
> Wylie Bean
> Greensboro NC
>
>
>
> Sent on the new Sprint Network
>
> ----- Reply message -----
> From: "Duncan Thomson" <thomson.duncan at gmail.com>
> To: "s-car list" <s-car-list at audifans.com>
> Subject: [s-cars] Intermittent stall
> Date: Sun, Aug 2, 2015 8:51 PM
>
> Hey folks,
>
> I know I should probably do a lot more searching before I ask, but email volumes seem low!
> I am getting an intermittent stall at idle. It is a clean cutout, and the engine just goes straight from running smoothly to stalled, instantly.
>
> It seems to do the same thing when running, but with some extra revs on it catches again and keeps running.
>
> Any ideas where I should look first?
>
> Is it possible I'm losing spark on 3/5 cyls from a dodgy POS?
> More likely to be Crank position or something else?
>
> Any advice gratefully received!
>
> Cheers
> Duncan
> '93 UrS4 Avant
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