Yes, for testing purposes, where the injector is held open for long periods of time, you would not want to use 12v without some kind of cooling aparatus or PWM built-in to the test rig...colin john king wrote:I am informed by a company who clean and test injectors that 12 volt can be applied to a high impedance injector to test but a low impedance injector may burn out with constant current applied. Is this not the reason for PWM and flyback boards on megasquirt?
I missed this earlier:
I didn't realize you were testing the injectors, sorry for the confusion.colin john king wrote:Best answer is to test one injector by powering it with 12 volts for 30 sec and measuring fuel amount injected.
I don't know, however, if 5v will be enough to get the injectors open under the pressures of the fuel system. The PWM code applies 12v for a short burst, then modulates it to acheive a lower holding field... perhaps you could open the injectors then charge the fuel system.
It would be neat for someone to make a code addition for an injector test mode. There are many instances where you want to see if all the injectors are firing... Oh Phill...!
-Brian
Waiting delivery. Do you know is that injectors ( Nissan 200SX) are low or high impedance?