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fuel filter is on back of engine drivers side remove fill new filter with clean diesel fuel put back on; the fuel water seperator on my truck is a clear plastic filter take off drain clean real good put new fuel in and reinstall try to restart engine and let run 5-10 minutes if truck wants to die out you may have to bleed system on the engine drivers side is a small pump un screw plunger take the plug above new fuel filter on housing out pump the plunger until fuel comes out the hole where you removed plug reinstall and tighten up your done

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Q: How do you change the fuel filter and water seperator on a 2003 Isuzu npr diesel?
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