I sell my CRX LS-T and got a new civic Hatch 1989 im preparing to entry a circuit race. Previously i use it for Drag Race.

Right now i am re-doing the wiring... but i want only the most basic wires to get the car starts and runs ok. Got wired inyectors, TPS, MAP, IACV, Dizzy, Alternator, O2, Main Relay and the wiring that goes to the kill switches.

The problem i have are with the resistor box, right now have all 4 ground wires from the inyectors to the resistor box, but i dont know where to put the red wire that goes to the ecu, or if i just can put it to any ground to the chassis.

The question are where to put the red wire from the Resistor box

Some pics 4 u

 

the red wire from the resistor box just gets a positive 12v source. make sure it is hooked to a switch so you can shut it off. the ecu triggers the injectors with a negative ground

 

Thanks EvansPerformance...

Ok, if im going to convert to obd1, all 4 grounds from inyectors goes the same diectly to the 12v source switch?

And one last question about Dizzy ground... Some guy tells to me, he got the dizzy black wire ground to a 12v source switch. I cant believe it because are supposed to be a ground?... then... where it goes the positive wire I wired the black wire to the chassis and positive to a switch

 

im not sure about the distributor. never needed to mess with their wiring.

the injector grounds go to the ecu, and the positives can be run together to a switched 12v positive source.

 

Finally... Can i remove the main relay from the wiring leaving just the ECU and switches to control all the electronics? or that thing have more functions. Right now ignition and fuel pump are controlled with switches, inyectors and dizzy to the ecu and the main relay i think are acting just as a bridge for some 12v and 3 sensors

 

good luck with the project

 

you got some work ahead of you.

 

cool