Just checked now. Spark at each plug. Fuel to injector rail, no fuel from injectors. I've got the fuel line that goes Into the rail currently in a bottle, If I leave the key in position 2, disconnect the battery and reconnect it, you hear the stepper motor, simultaneously fuel flow is constant till the stepper stops. Cranking gives a constant flow of fuel. Connect the fuel line to the rail, crank the engine for 10 seconds, remove plugs and bone dry.
What's causes the injectors not to inject? This is my second complete inlet manifold and TB so isn't the fuel rail or sensors on it as I know they worked on the last vehicle
The ECM determines when to operate the injectors
based on the signal it receives from the CKP sensor.
The ECM provides an earth signal for the period the
injectors are required to be open, the injector
solenoids are energised and fuel is sprayed into the
inlet manifold onto the back of the inlet valves. The
ECM carefully meters the amount of fuel injected by
adjusting the injector opening period (pulse width).
During cranking, when the engine speed is below
approximately 400 rev/min, the ECM increases the
injector pulse width to aid starting. The amount of
increase depends upon engine coolant temperature.
To prevent flooding during cranking, the ECM
periodically inhibits the operation of the injectors.
