diulay_pkjai

I have searched but I can't find a conclusive answer. I'm getting conflicting information. ProStreet Online says a working F23A injector should be 5-7 ohms, so that seems to be closer to a low impedance. But I've found some OEM Honda Accord 240cc injector listings, the sellers says they are high impedance. Does anyone know for sure if they are high or low impedance? Thanks.

schreps

The dc resistance of a stock 98-02 f23a1/a4 injector, 06164-P8A-A00, is 11.47 ohms (1 sample) measured with a fluke dvm.
The dc resistance of a stock JDM f23a injector is 12.47 ohms (1 sample) measured with a fluke dvm.
looking on RC Engineering's website, their 550cc saturated injector resistance is 12.5 ohms
https://www.rcfuelinjection.com/Stor...rated-injector
So these are "high impedance" injectors

A peak hold injector resistance is 2.5 ohms...
https://www.rcfuelinjection.com/Stor...-hold-injector

More technical comment:
If you want the actual impedance you will need an impedance analyzer or a spectrum analyzer w/current sensor, but the magnitude of the impedance will be greater than the dc resistance since the injector circuit looks like a resistor in series with an inductor. As the rpm increases the impedance magnitude will increase because the inductor reactance is 2*pi*frequency*coil inductance. So the impedance is R + j*2*pi*frequency*coil inductance. (R is the dc resistance)
The injector's "impedance" is a nonlinear function of current due to displacement of the pintle valve modulating the coil inductance so it needs to be measured at the 13.5V drive voltage, operating fuel pressure and across the operating frequency range (rpm range).

diulay_pkjai

Ok, thanks for the reply. I'll look for high impedance injectors then.