[s-cars] Hard Start, then No start continued........

[brian hoeft]

I second the Bosch suggestion if it turns to that, but not my first
suspect. Kinda sounds ignition related. Though I just replaced an FPR for a
similar condition, but it was tell tale failure when there was lots of fuel
in the vacuum line.

A gentle twist and pull up and the FPR will probably still fight to stay it
place. If its not already dripping out, a little gasoline will help lube
the o-rings on install.

On Sun, Dec 18, 2011 at 12:22 AM, Varon H. Fugman
<vfugman at globaldialog.com>wrote:

> >> Any BTDT or writeups to give me an idea of what's involved with the FPR?
>
> The FPR is easy.  Just depressurize the system first by breaking a
> connection at the fuel filter or firewall first with a rag wrapped around
> it.  Once you pull the clip the FPR will come straight up.  It is a snug
> fit, so it might take a little persuasion to come out and for the new one
> to
> go in.
>
> >>Also curious as to, if replacing these does not work, if I can test the
> Fuel Pump while still in the tank without any special "fuel
> metering/pressure" tools or anything?  On every other audi I've owned, the
> pump has always made a distinctive noise when pressuring the system upon
> startup.
>
> The fuel pump relay isn't engaged by the ECU until after the engine is
> cranking and good signals are coming from the crank and cam position
> sensors.  If the fuel pressure regulator and the check valve in the pump
> are
> good the system should hold pressure, so the system shouldn't have to
> repressurize on startup.
>
> You can manually activate the pump by "injecting" +12V at fuse 17.  If all
> is good you'll hear it run.  You can disconnect the fuel supply line at the
> driver's side firewall and pump fuel into a can to test flow, but this
> won't
> guarantee the pump is supplying adequate pressure.  If you disconnect the
> return line from FPR instead you should also get fuel flow--otherwise the
> pump isn't building up enough pressure.  Rig up whatever jumper
> wires/switch/helper you need to run the fuel pump for testing--just keep
> any
> sparks as you start/stop the fuel pump well away from any gasoline
> vapors!!!
>
> >>What is the preferred replacement Fuel Pump for the '95 ur S6?  Looking
> for drop in, plug and play.  Only mod is a chipped ECU at the moment.
>
> The VDO is plug-and-play, but I can't recommend it, because mine failed
> after 14 months and 11k miles (just out of warranty!)  What's worse, it
> failed such that it still made the normal noise, still pumped a good volume
> of fuel, but didn't build enough pressure to fire the injectors.  At least
> it failed while I was driving up my driveway!
>
> I replaced it with a Bosch pump which required cutting off the original
> ring
> terminals and crimping on spade connectors.  There was no marking as to
> correct polarity, and of course with a 50/50 chance I got it wrong.
> Evidently the physical orientation of the terminals is opposite the OEM and
> VDO pumps.  Rather than dive into the fuel tank again, I swapped the wires
> in the wiring harness in the trunk.  It was working fine after 14 months
> and
> 17k miles when the car last ran 10 days ago!
>
> Varon
> '95 urS6 not starting either
>
> P.S. Found out my wife took the insurance off my S6... :-( I was planning
> to
> fix it tomorrow afternoon!  (Hopefully!)  If I do get it running I guess I
> can drive in circles around the driveway. ;-)
>
>
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-- 
*       -Brian*
      [blinders off&ear <http://208.53.138.125:8068/>plugs out]