No warning cut out

[urq]

... the fact that the tach continued to work is perhaps the key fact IMO ... 
this means that the ECU was still trying to run the engine ... and I would 
say that you still had spark.  I'd hold off on the ICU for now at least. 
The only other items are air and fuel ... and you indicate that from your 
POV fuel should not be an issue.  While your situation seemed like the car 
was not experiencing any side to side motion when this occurred, I had a 
weird one on the '88 5KCSQA where the engine could flat die ... usually 
after a turn ... and the culprit was the funky "hose" for the crankcase vent 
system down on the back of the engine near the oil pan on the spark plug 
side.  As the deteriorated piece flops around it can supply a massive source 
of unmetered air to the engine.  I suppose you could have also had a 
situation where vacuum built up in the fuel tank, so even though your pump 
was working it could not overcome the suction ... make sure your crankcase 
ventilation system is functioning properly ...

Good luck!
Steve B
San Jose, CA (USA)
>
> Yesterday, I drove down to Northern Virginia from South Jersey to pick up
> some parts from a friend. I drove my 1987 5000cs TQ. MC1 with IA chip and 
> AAN
> wastegate. Other than that, it's stock. Everything driving down was fine, 
> not a
> problem to complain about. I was driving with the climate control set at 
> ECON
> just to circulate air. The cruise control was on some of the time and off 
> most
> of the time. All the windows were up and the sun roof was tilted up. Temp 
> gage
> was indicating normal/on the cool side. It was between 65 and 70 degrees. 
> On
> the way back, I had a major problem or perhaps, better said as a major 
> hiccup.
> I was on I-95 north, just north past Baltimore, MD. I was driving with
> traffic when without warning I get nothing. Pressing on the GO pedal gets 
> zero
> response. Every light on the dash was on that would have been associated 
> with any
> other engine stall while at speed. Pressing on the clutch pedal brought 
> the
> Tach to zero, releasing let the engine speed indication return. The sun 
> glare was
> so bright, that I could not see my hazard lights on the dash going on/off. 
> I
> made my way to the right lane/shoulder and coasted as far as I could after
> going about 75-80 mph with the traffic. I stopped under a bridge and tried 
> to
> remember if there was anything unusual before this happened. (a word of 
> advise:
> Never stop under a bridge if it's a nice day out. It was so noisy under 
> there
> with my car not running, I couldn't hear my hazard relay working or even 
> if the
> car was running) I closed all my windows and sunroof and tried to listen
> closely at my attempt to restart the engine. It cranked but nothing was 
> happening.
> I let it sit for about a minute and I tried again and it started like 
> nothing
> was wrong. Not wanting to press my luck, I put her in gear and merged into
> traffic under hard boost (1.8 or so) No problems at all for the rest of 
> the
> trip. Trouble shooting from my desk here, I can only think of a couple 
> things. The
> first being that the fuel pump cut out for some reason. The second, I lost
> all ignition spark. I would like to rule out the fuel pump because it is 
> fairly
> new from the spring/summer of 2004. Maybe an ignition switch. May just a 
> tune
> up is needed, but that still doesn't give way to the abrupt cut off at 
> highway
> speed yesterday.
>
> Any idea's? I haven't done any real trouble shooting yet. The last time 
> the
> car had a real thorough tune-up was right before I left for Atlanta, GA 
> after
> 9/11. The car just turned 285,000+ miles as of yesterday.
>
>
>
>
> Jim Furdyn
> 1983 UrQuattro #170
> 1987 4000cs Q
> 1987 Euro 200/5000cs TQ 285,000 miles
> 1996 A6 Quattro Avant
> 1987 Mercedes Benz Truck model 1219
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro