Vehicle & Technical > Range Rover

Fuel pressure

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muddyweb:
Just before I go digging about in the manuals, does anyone know what pressure the fuel rail should be at on a 3.9 / 4.0 / 4.6 V8 engine ?

muddyweb:
In case anyone needs to know....

The 4.0 and 4.6 engines are both 2.4-2.6 bar regulated with the vacuum connected.

The 3.9 is 3.5 bar unregulated, as are most of the Lucas systems.



Off to stick a guage on it now  :-s

Range Rover Blues:
What's the difference between regulated and unregulated then Tim?

muddyweb:
From what I can tell... the regulated figure is with the vacuum hose connected... unregulated is without.

Range Rover Blues:
So in fact a more accurate measurment then? unless you also measure manifold depression (vacuum).

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