Fuel Filter (s)?

[Graham]

HI all,

my MU is using a bit of fuel these days and one thing I thought of is - could there be a 2nd fuel filter?

Does anyone know of a second filter being used in a MU or Isuzu and if so, where could it be?
I was talking to a guy with a Landcruiser and his has a 2nd filter below the drivers seat (under the chassis, not above) but that's because it has dual tanks.

Any clues?
Cheers! G.

[geeves]

Only one filter. Fuel use is more likely injector problems. Is there black smoke?

[Roger]

How about fuel tank venting. My vent is blocked so I didn't close the cap properly and got an extra 1-1.5km/litre straight away. I got 9.7km/ltr on this tank. I haven't seen that sort of number in ages.

Performance increased too, and revving freely.