Do you have access to Mitchell1 Prodemand? If you are willing to share user/password (we can pay $250), please get in contact with us ASAP: email operation-charm [[at]] tuta.io or click to submit anonymously. (I know, we said we wouldn't ask any more...but it's important!)
Operation
OPERATION
The fuel injectors are 12 volt electrical solenoids. The injector contains a pintle that closes off an orifice at the nozzle end. When electric current is supplied to the injector, the armature and needle move a short distance against a spring, allowing fuel to flow out the orifice. Because the fuel is under high pressure, a fine spray is developed in the shape of a hollow cone or two streams. The spraying action atomizes the fuel, adding it to the air entering the combustion chamber. Fuel injectors are not interchangeable between engines.
Injector operation is controlled by a ground path provided for each injector by the PCM. Injector on-time (pulse-width) is variable, and is determined by the PCM processing all the data previously discussed to obtain the optimum injector pulse width for each operating condition. The pulse width is controlled by the duration of the ground path provided.