spark on cylider 2-3 and no fire 1-4

[dsmnthamakin]

alright guys i really could use some help i have tried absolutly everything and still have nothing. i have replaced the coil brand new from mitsubishi, replaced the transistor. still have no fire on cylinder 1 and 4 checked all my wiring made sure my grounds okay and nothing. i swapped my ecu with a known good one and still nothing. i also replaced the cas and i am running out of options. i replaced the transistor because i thought i might have gotten a faulty one from factory but thats not the case. its been about 8 months since i started my project and i just want to get it running right. pls help if you have any idea.

 

[steve]

Well short of the wiring harness there isn't much left that you haven't replaced.
It sounds lile you'll have to start debugging the problem rather than parts swap. Which end or the ignition are you more comfortable with. You can either start at the ECU end and make sure than you are getting a good CAS and TDC signals then check that the ECU is putting out both signals to the Power Transistors and work forward to the plugs look for where the system fails or start at the plugs and work back until you find where the systems starts working.

Some of this you can test with a basic multimeter and some is going to require a scope to check.

Steve