Mk6 Not starting

[metalworker0]

So it's maybe a TDDI not TDCI

Difference is:
TDDI.. pump times the pulses of fuel to each individual pipe that supplies individual injectors.
TDCI. has electronic injectors fed by a common pipe known as a rail.. there is noticeable wiring going to each injector.

all the best.mark

[Galway]

Thanks.
It is definitely TDCI.

[knobby1]

Yip, and thanks, but based on last post, wondering which direction to take. This variant doesn't appear to have a PRV on fuel rail. One would expect such high pressures to have been diverted, or am I missing something?

PRV on the rail is only Mk7, normally the Mk6 TDCi PRV is part of the pump. They don't blow off until ~1600bar.

Fuel rail pressure is controlled by the metering valve, (SCV on a Mk7).

Lord Knobrot (Smithy)

[Galway]

Thanks Knobby.
This metering valve, is that the electrically operated one within pump?
He has replaced with a new one.
Or is there a purely mechanical one within that can be replaced?
Really at a loss with such high pressure and seems counter-intuitive to go replacing pump.
Any knowledge/ direction, really appreciated.

[knobby1]

Thanks Knobby.
This metering valve, is that the electrically operated one within pump?
He has replaced with a new one.
Or is there a purely mechanical one within that can be replaced?
Really at a loss with such high pressure and seems counter-intuitive to go replacing pump.
Any knowledge/ direction, really appreciated.

Yes, essentially it will be just like the SCV on the Mk7, electroncally controlled via the PCM.

Lord Knobrot (Smithy)

[Galway]

Thanks very much knobby.

[Rollingbob]

What if the fuel filter stays about half full and still tried a new filter/housing, starter, battery, crank/cam sensors, ignition switch, grounds reading good voltage, alternator good, no error codes, apart from the p0480 fan sometimes starting on poor cranking...

Have ordered a new engine wiring loom now and fuel filter pipes.

Luckily always starts back up on the jumper battery pack