Do high impedance injectors need resistor box?
Registered. If your injectors are low impedance, unsaturated, then you need to use a resistor box which wires up to all the injectors. If they are high impedance, saturated, then you’re good to go.
What does the injector resistor box do?
The injector resistor box is for the injectors so they function properly at the correct voltage (peak and hold 2-4 volts). Saturated injectors use 12-16 volts and do not need a resistor box.
Are ID injectors low or high impedance?
Print. All Injector Dynamics injectors are high impedance. If your car came with a low impedance injector and a resistor ‘box’, it will need to be bypassed. The wiring at the resistor box should have 1 more wire than the number of cylinders, 5 for a 4 cylinder, 7 for a 6 cylinder, etc.
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 obd1 injectors need a resistor box?
Re: do obd1 cars have fuel injector resistor box’s (90DX) no….. because when going from obd0 to obd1 the pin locations are going to be off. the conversion harness will put the pins into the right place for the new ecu.
When did Honda stop using low impedance injectors?
Early Hondas used low impedance injectors with a resistor pack. From about ’92 to ’96 Honda transitioned from low impedance to high impedance without a resistor pack. Over the years we have seen many low impedance injectors installed without a resistor pack, and many burned out OBD 1 ECUs (and several RSX-S ECUs) as a result.
How are low impedance injectors cooled by fuel?
Injectors are normally cooled by fuel. What these figures show is that the 2.5 ohm injectors without a resistor pack run hotter heat the and fuel more than stock injectors. 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.
How are stock 12 ohm injectors connected aftermarket?
Stock 12 ohm injectors were connected and the temperature rise graphed until the temperature stabilized. The transistor pack was allowed to cool. Aftermarket 2.5 ohm injectors were connected and the test rerun. The transistor pack is soldered to the circuit board, so heat is being removed by conduction and convection.