S13 sr no spark

[240msh]

I was driving casually down the street and i shifted to 3rd and the car just died.. So we pushed it to a parking lot to find out theres no spark, we tried 5 different igniter chips, different coilpacks, checked wiring, everything.. but the one thing we didnt check was ecu until the next day. So we swap out the ecu and now it has spark, but since the ecu wasnt tuned it ran like shit and then just shut off again, so my question is, what in the wiring harness could be causing ecus to short out? If anyone is good with wiring please let me know so i dont have to spend $400 on a new harness

[z31andrew]

You need a tuned ecu.

[240msh]

have a tuned ecu from jwt, what im saying is something is breaking the ecus i put into the car to cause them to not have spark

[z31andrew]

did you check all the harness and chassis grounds to make sure it wasn't shorting out at all?