8P S3 Anyone had problems with the fuel relief valve on the fuel rail?

[elgan]

been having problems with the car, fuel pressure jumping from good 120+ pressure to as low as 7 bar at the rail.

i was told a fuel relief valve on the fuel rail maybe at fault. i bought part from audi at 19+vat. its a threaded piece that goes in below the inlet manifold and accepts fuel line. I havnt changed it yet as it looks in an awkward place!

anyone had to change one of these before?

I looked to change the sensor/valve on top of the fuel pump (32mm spanner fixing), but they said this comes complete with a fuel pump only?

current fault code reads Low fuel pressure.

Help, im missing the car big time!

 

[Mpathe]

wrong section pal, but dont think your car is supposed to run anywhere near 7 bar of fuel pressure, 8l s3 runs std 3 bar reg

 

[elgan]

ah ********. this is the old shape s3 isnt it? can someone move it into the new type s3 for me?

pressure at the rail on a tfsi s3 should be 100+, hence that cam driven hpfp.