All,

I have a current stalling/starting problem with my '86 5000 TQ.

-Starting: Sometimes if I release the key before the motor starts
(generaly fires in 3-4 seconds of cranking), I have to wait ~5 min
before making another attempt. If I attempt to start before ~5 mins,
engine will maybe 'pop', but will simply crank (as if no fuel in the
system.) Happens mostly COLD, sometimes WARM.

-Stalling: Earlier this week, stalled out in an intersection (WARM
engine). Same as above, had to wait ~5 mins then restarted.


Any thoughts? Thanks!

ign switch?
loose intake boots?
residual fuel pressure leaking down too fast!

"Matt" <mattmondo (AT) gmail (DOT) com> wrote

Or leaking injectors causing flooding. Try a bottle of Techron injector
cleaner.

dave AKA vwdoc1 wrote:

On Sep 11, 11:32*am, Matt <mattmo... (AT) gmail (DOT) com> wrote:
i had a 200 quatro with the same symptom. it turned out to be a hole
worn into the underside (hard to see) of a 2" rubber hose leading from
the top front of the engine compartment to the air intake. i think
what was happening was that the computer was compensating for the hole
at times (after you got it running) but then had difficulty
maintaining the right settings at other times (slowing down comming
off the highway)

hope this helps - it was a bear to figure out

In article
<5ff0a1db-6774-4fd1-9dcc-de1af08cec4d (AT) g31g2000yqc (DOT) googlegroups.com> Matt,
mattmondo (AT) gmail (DOT) com writes:
Fuel pump relay?

Quite easy to eliminate by replacing it with a jumper wire (across the 2
large terminals). For safety reasons do not leave the jumper wire in
place as the fuel pump will be running all the time it is there.

G.

The fuel pump normally runs constantly when the engine is running and it
will still shut off when the ignition is turned off.

The risk is that in an accident the key will be on and the engine
stopped and with the possibility of leaking fuel there is the potential
for a fire that will continue to be fed. Not a good idea but the test is
still valid to see if the relay is the problem,

The issue could be a number of things but vacuum leaks, fuel pressure
issues an ignition problem due to hall effect module on distributor are
places I could check.

Replace fuel filter, Clogged screen on the fuel pump, injector issues,
sticking air flow plate in intake box, plugs / wires ...

ovalking wrote: