The nozzle is designed to atomize the fuel — to make as fine a mist as possible so that it can burn easily. The amount of fuel supplied to the engine is determined by the amount of time the fuel injector stays open. This is called the pulse width, and it is controlled by the ECU...
* Start up fuel enrichment on fuel injected engines. When the PCM receives a cold signal from the coolant sensor, it increases injector pulse width (on time) to create a richer fuel mixture. This improves idle quality and prevents hesitation while the cold engine is warming up. As the engin...
The ECU determines precisely how much fuel needs to be delivered by the injector by monitoring the engine sensors. B. The ECU turns the injectors on for a precise amount of time, referred to as injection pulse width or injection duration, to deliver the proper air-fuel ratio to the engine...
If the coil, spark plug and plug wire all appear to be okay, the misfire may be due to a dirty or dead fuel injector (check the injector's resistance and voltage supply, and use a NOID light to check for a pulse from the PCM driver circuit. If the injector appears to be okay, do...
Check Fuel Gauge:Note if it’s near or on empty. Physical Inspection:Inspect the ground where you usually park for fuel signs. If you notice any, it could be a leakage. Listen for the Fuel Pump:When turning the key to the on position (before starting), you should hear the fuel pump...
check if the vehicle is equipped with a 25-pin DLC connector and also check to see if the above test can be carried out. Serious damage to the PCM will occur if the test is carried out on a vehicle that does not support the above test method. Refer to the manufacturer's wiring and...
This interval can not be bigger than the duration of the first LOW (picture 4) which appears each time the injector opens. So, we check that and if it's bigger we don not take it into account. (If it is bigger this means that this is the long HIGH between 2 subsequent LPG injector...
A mixture feedback device is used to determine the instantaneous mixture of a running engine, where these parameters are introduced back into the fueling equation in the ECU for real time injector pulse width correction. The main demand of the mixture feedback device is that it needs to be ...