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[hot87crx]

I built my megasquirt and i pulled all of the sensors and relays that i need. I'm in the process of making my wiring harness. Do i need to keep the injectors resistor box or do i remove it? DO i need to change the resistors? Any help would be great.

[Abaddon]

Low-impedance injectors require some form of current limiting. MegaSquirt can run low-impedance injectors with resistors and feed them a +12V supply directly or MegaSquirt can use Pulse Width Modulation (PWM) to limit the current and perform peak-and-hold without using any resistors.

The easiest method (the way I run it) is to use the resistor box and disable the MegaSquirt's PWM injector current limiting (by setting PWM% to 100%, and time threshold to 25.4msec). This way you don't have to deal with correctly configuring the PWM parameters.

Definetly read up on MegaSquirt's site about injectors: http://www.megamanua...manual/minj.htm

The resistor box is wired up the same way it is with the Honda ECU: +12V into the resistor box, 4 wires out of the resistor box to the 4 injectors, and 4 wires from the injectors to the ECU to which the ECU supplies ground to open the injector.