5KCSQ dies & wont restart for a few minutes

[Mark]

Also, you might want check for vacuum leaks.  I had a similar situation as you have
described when rolling upto a stop sign. The car would stall and take several minutes
before you could restart it.   Not a very pleasant experience I can assure you when you
are sitting at a busy intersection. In my case, the problem turned out to be a vacuum leak
on the 3-way vacuum hose (dry rot underneath the hose) located at the rear of the valve
cover.  (an '87 5KCSTQ).  Good Luck on the repair.


Ameer Antar wrote:

> Hard starting when warm is usually b/c the fuel system isn't staying pressurized
> after the car shuts down. The fuel pressure in the system will decrease if you have
> a bad fuel damper or fuel pump check valve. Also it could be caused by leaky
> injectors, including the cold-start injector, or even a bad pressure regulator or
> control unit. The best way to test for this is using a CIS fuel pressure gauge
> (cheapest is $60 at JCW). You just hook up the gauge, jumper the fuel pump, turn
> off the pump and watch the residual pressure. It should very slowly go down at the
> rate given by the shop manual. I guess you could also run the pump and then
> after shutting it off for 15 mins. see if there is much pressure in the fuel system by
> opening the fuel connection at the warm-up regulator. The Haynes manual uses
> the procedure for releasing the system pressure.
>
> For the other issues, I'd say give the car a tune-up, at least whatever parts are a
> little older. Chnage the fuel/air filters, check plugs, dist. cap, wires, and most
> importantly check for vac. leaks. There are many hoses that can develop small
> holes, usually on their undersides, which can cause lots of problems. Make sure
> ALL hoses are in good shape. Pulling them out will leave no chance for a hose to
> hide holes and cracks on you. This is real common Audi stuff so don't fret, you'll
> find the problem soon. Good luck.
>
> ---Original Message---
> >
> >To: quattro at audifans.com
> >From: quattro-request at audifans.com
> >Reply-to: quattro at audifans.com
> >Date: 7/15/2002 9:40:28 AM
> >Subject: quattro digest, Vol 1 #3669 - 19 msgs
> >
> >--__--__--
> >
> >Message: 17
> >From: paanta at splatterfish.com
> >To: quattro at audifans.com
> >Date: Mon, 15 Jul 2002 07:10:58 -0400
> >Subject: 5KCSQ dies & wont restart for a few minutes
> >
> >My 5KCSQ is still doing its weird thing:
> >
> >The car starts a little hard in the morning, but always starts with a
> >little extra gas.  Once it starts it idles ok for a few seconds and then
> >the idle starts to get lower, and lower, and lower and you have to
> >heel-toe whenenver you put the clutch in and come to a stop to keep
> >the car alive.  Once the car is warm, it'll idle OK if you don't let the
> >RPM's drop on their own.  You can slowly bring the car down to idle
> >and it will idle fine...albeit a little rough.  Before this weekend, if
> >the
> >car died, it would restart after a couple of seconds if you let it just
> >sit.
> >However, now, if the car DOES die, it is _extremely_ hard to get
> >restarted.  At a bare minimum, you have to wait about two to four
> >minutes before it will allow you to restart it.  If you try too soon, you
> >just have to wait another couple of minutes.  It leads to some fun
> >situations at stoplights.
> >
> >Anyone know what this is?  Could it be caused by a bad plug wire?
> >I've got at least one plug wire that is suspect.
> >
> >-Pat
> >
> >--__--__--