AuthorTopic: Fuel pressure  (Read 894 times)

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Offline muddyweb

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Fuel pressure
« on: September 13, 2005, 00:06:27 »
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 ?
Tim Burt
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Offline muddyweb

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Fuel pressure
« Reply #1 on: September 14, 2005, 10:54:55 »
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
Tim Burt
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Offline Range Rover Blues

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Fuel pressure
« Reply #2 on: September 16, 2005, 00:28:22 »
What's the difference between regulated and unregulated then Tim?
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Chuggaboom, 1995 Range Rover Classic
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Offline muddyweb

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Fuel pressure
« Reply #3 on: September 16, 2005, 00:33:59 »
From what I can tell... the regulated figure is with the vacuum hose connected... unregulated is without.
Tim Burt
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Offline Range Rover Blues

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Fuel pressure
« Reply #4 on: September 16, 2005, 00:58:32 »
So in fact a more accurate measurment then? unless you also measure manifold depression (vacuum).
Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
1995 Range Rover Classic Vogue LSE with 5 big sticks of Blackpool rock under the bonnet.

 






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