2G I need the ultimate list on loss of spark

[shifty2006]

I am still chasing my issue of loss of spark on 1 and 4 I at this point am just looking for the ultimate comprehensive list of things to check for spark loss I have swapped cas, coils, ptu, and that little resistor on the side of the intake each 3 times and I have checked and tested those wires time after time and can't figure it out. 95 gst 97-98 cas and head. Plugs and plug wires both gapped at checked and replaced and gapped and checked.

 

[shifty2006]

im not sure where the ecu grounds to the chassis I thought it went through the mounting bolts of the ecu to ground it? ive checked the grounds under the hood and even added a couple that I saw suggested on someones post on here to see if it would help. I cleaned the contact points with a wire brush and reattached. luv2rally thanks again. I will definetly try to make it do it again and attempt to test everything is there anything that could have possible fried the drivers? and yes I bought the pigtail to use the 1g cas