Injector Pressure Test
- Connect pressure gauge to fuel pressure test fitting. Disconnect coil connector from coil. Disconnect electrical lead from 1 injector and pressurize fuel system. Disable fuel pump by disconnecting inertia switch or fuel pump relay. Observe pressure gauge reading.
- Crank engine for 2 seconds. Turn ignition off and wait 5 seconds, then observe pressure drop. If pressure drop is between 2-16 psi, injector is operating properly. Reconnect injector, activate fuel pump, then repeat procedure for other injector.
- If pressure drop is less than 2 psi or more than 16 psi, switch electrical connectors on injectors and repeat test. If pressure drop does not meet specification of 2-16 psi, replace disconnected injector with same color code, then reconnect both injectors properly and repeat test.