MX-5 Miata L4-1.8L DOHC (1996)
-
Disconnect the negative battery cable.
-
Install a fuel pressure gauge between the fuel pipe and the fuel main hose. (Install clamps as shown.)
-
Connect the negative battery cable.
-
Connect data link connector terminals F/P and GND by using a jumper wire.
-
Turn the ignition switch to ON.
-
Measure the fuel line pressure.
Fuel line pressure: 265 - 313 kPa (39 - 45 psi)
-
Pressure low: Check fuel pump maximum pressure. If as specified, fuel line or fuel filter might be clogged or restricted.
-
Pressure high: Replace the pressure regulator