MPV 4WD V6-3.0L SOHC (1990)
If pressure is lower than the minimum specified, check fuel filter. If filter and return line are OK and pressure is still not within the specified range,
replace pressure regulator.
10.
Disconnect vacuum hose from fuel pressure regulator with engine idling.
^
Fuel pressure should increase when vacuum hose is removed.
38 - 46 psi (265 - 314 kPa)
If not, replace pressure regulator.
11.
Shut engine "OFF" and wait 5 minutes, then observe residual pressure on gauge.
Minimum 21 psi (147 kPa)
If not, check for leaking fuel injectors. If injectors are not leaking, replace pressure regulator.
If all test results are OK, fuel pump and pressure regulator are OK.
