Most diesels don't have a fuel pressure regulator, The primary pump pressurizes a fuel loop keeping fuel ready for the injector pump.
Throw in a few filters and thats about it.
And you certainly don't want to mess with the injector pump.
Fuel Pressure Regulator is located on the fuel rail.
1. Disconnect the negative battery cable.
2. Properly relieve the fuel system pressure.
3. Remove the air cleaner outlet tube(s).
4. Remove any necessary components to access the pressure regulator.
5. Disconnect the vacuum hose from the pressure regulator.
6. Remove the pressure regulator attaching screws.
7. Remove the pressure regulator from the fuel rail.
To Install
8. Discard the O-rings on the pressure regulator and replace them with new ones.
9. Lubricate the O-rings with clean engine oil.
10. Install the regulator into the fuel rail and tighten the retaining screws.
11. Connect the vacuum hose to the regulator.
12. Install any components removed to access the regulator.
13. Install the air cleaner outlet tube(s).
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What is the actual problem? Most international diesels, which this is, do actually have FPR's. This could be in front of the fuel filter housing. It should have a tube bolted to the housing with a schrader valve and two fuel lines. The FPR is in this housing. I havn't seen many problems with this however and you basically take it apart, check for scarring, and put it back together. You really need to check fuel pressure at the schrader valve though. around 50 psi at idle and maybe up to 60 at wide open throttle.
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