Ok, the most common problem is a faulty fuel pressure regulator.
it is located on the fue rail:
Attach a fuel pressure gauge to the service port of
the fuel filter (see page 11-92).
Pressure should be;
265-314 kPa (2.7-3.2 kgf/cm2, 38-46 psi)
(with the fuel pressure regulator vacuum hose disconnected
2. Reconnect the vacuum hose to the fuel pressure
3. Check that the fuel pressure rises when the vacuum
hose from the fuel pressure regulator is disconnected
If the fuel pressure did not rise, replace the fuel
IF you dont have a fuel pressure gage, a good(but not conclusive test) test is to remove the vacuum hose from the pressure regulator. If there is any fuel in it, then its bad.