Table of Contents
What causes injectors not to fire?
So, the most likely cause, is that the fuel injectors are probably not opening. The (PCM) uses the trigger signal from the crankshaft position sensor; and/or camshaft position sensor to pulse the injectors.
What is boost reference?
The boost reference originates at the induction system of an engine, and acts upon the diaphragm in the regulator, thereby enabling the regulator to compensate for boost pressure. If the port is not used to maintain constant fuel pressure, such as with normally aspirated engines, then it is vented to the atmosphere.
What is a rising rate fuel pressure regulator?
If the fuel pressure regulator (aftermarket or OEM) is connected with a vacuum hose to the intake manifold, then regulator is a 1:1 rising rate. This means that fuel pressure increases with boost and decreases with vacuum at a 1:1 ratio. However, the fuel rail pressure is not necessarily what the pump is seeing.
What tells injectors to fire?
The initial trigger is the crank sensor. When the crank sensor is in position for the rear cyl, this starts the sequence for the front injector. Then visa versa . From there the maps/ rpm and sensors refine the timing and pulse from the start signal of the crank sensor.
What is an EFI sensor?
EFI Controls and Sensors. EFI uses sensors to determine how much fuel is needed at any given moment.
Why is the fuel injector not opening on my car?
So, the most likely cause, is that the fuel injectors are probably not opening. The (PCM) uses the trigger signal from the crankshaft position sensor; and/or camshaft position sensor to pulse the injectors. So, a worn-out belt can prevent the Crankshaft-Camshaft Position Sensor from synchronizing; causing the sensor to send the wrong signal.
Why does my car not start when the fuel pump is running?
Your engine will not start, is an all too familiar experience, for any vehicle owner. The fuel pump is running and delivering normal pressure to the engine But, with all that working your engine still will not start. So, the most likely cause, is that the fuel injectors are probably not opening.
What causes wear and tear on fuel injectors?
Driving a car hard, combined with short start stop journeys, will increase the wear and tear on injectors. Letting the engine cool down, before shutting it off, will increase the lifespan of the injectors. This will also, benefit the rest of the engine too.
Why do fuel injectors need to be changed so often?
If an engine isn’t running efficiently, this can load extra pressure on injectors. It’s also important, to regularly change the fuel filter, to ensure a proper fuel flow. Driving a car hard, combined with short start stop journeys, will increase the wear and tear on injectors.