MX-5 Miata L4-1597cc 1.6L DOHC (1992)
Fuel System Priming
WARNING:Before performing this test, relieve fuel pressure as previously described.
1. Disconnect battery negative terminal.
2. Install fuel pressure gauge as described above.
3. Reconnect battery negative terminal.
4. Connect a jumper wire across diagnosis connector terminals "F/P" and "GND."
5. Turn ignition switch "ON" for ten seconds to operate fuel pump.
6. Turn ignition switch "OFF" and remove jumper wire.
7. With an appropriate clamping tool, block fuel return hose (outlet hose from pressure regulator).
8. Observe pressure gauge for five minutes to ensure that fuel maintains specified pressure.
HOLD PRESSURE: Greater than 21 psi (147 kPa)
9. If not as specified, check for possible problems such as leaking injectors, leaking hoses or connections or defective fuel pump.
10. Repair any problems detected and recheck. If pressure is still not as specified, replace pressure regulator.
