What sends signal to injectors?
The (PCM) uses the trigger signal from the crankshaft position sensor; and/or camshaft position sensor to pulse the injectors.
What would cause no injector pulse?
When these fuses blow, the system they support stops working, and the engine stops running. As a result, there is no injector pulse while craking. In case of that, there is no injector pulse or spark, which means that if your ECU has failed in operating in this case you have to get your ECU changed or visit an expert.
Will a bad fuel injector throw a code?
One of the obvious symptoms of a clogged fuel injector is the lighting up of the “Check Engine” light in your dashboard. The fault codes usually associated with a clogged fuel injector can range from misfire codes to lean codes. While the engine is running, monitor the engine misfire screen on your scanner.
What is the difference between high and low impedance injectors?
High-impedance injectors, also called saturated fuel injectors, are sent a 11-1/2-amp current signal to open, and that current stays on until the injector closes. Low-impedance injectors, also called peak-and-hold injectors, are sent a more powerful electrical signal, usually around 56 amps, to open.
Do low impedance injectors need a resistor box?
Running low impedance injectors without a resistor box will substantially increase the temperature of the transistor driver IC due to the increase in current flow. The temperature increase will depend on your driving. If that temperature remains high enough for long enough the driver transistor will be damaged.
How much resistance should a fuel injector have?
They will range from 12 to 17 ohms. Low impedance injectors are found on high performance and larger injectors. They have much lower resistance, typically around 2-5 ohms.
What is the difference between high and low impedance?
High impedance circuits are low current and potentially high voltage, whereas low impedance circuits are the opposite (low voltage and potentially high current). In audio systems, a high-impedance input may be required for use with devices such as crystal microphones or other devices with high internal impedance.
What happens when impedance is too low?
When connected to a speaker impedance load that’s too low, the amp will begin to get very hot and this can burn out the output transistors as they can’t handle the heat caused by trying to supply excessive current to a lower speaker load.
What is high low impedance?
Speakers are designated as either low- or high-impedance types. Low impedance is in a range of approximately 4 to 16 ohms. Low impedance speakers are used in various sound systems such as household stereo system and car audio system. High impedance usually means an impedance of several-hundred ohms to several-k ohms.
What is the difference between impedance and resistance?
Resistance is a concept used for DC (direct currents) whereas impedance is the AC (alternating current) equivalent. Resistance is due to electrons in a conductor colliding with the ionic lattice of the conductor meaning that electrical energy is converted into heat.
Why is it called impedance?
The opposition offered to the flow of current in an electric circuit whether AC or DC is known as the Resistance. The opposition offered to the flow of current in an AC circuit because of resistance, capacitance and inductance is known as Impedance.
What is difference between inductance and resistance?
Resistance is a constant pushback against electrical force, much like friction. Inductance is resistance to a change in electrical force, much like inertia. If current flows through a circuit with high inductance, the current will continue flow at a similar rate, resisting any changes to the flow.