[JP Noonan]

I would have a look at the injector connections and the common injector/ECU ground at the block. Replace the ground spade terminals at the ground point. The injector connectors can be squeezed carefully with pliers to make them bite in the injector tabs better.

My 75 2.0L would backfire and seemed to only be running on two cylinders, well, because it was only running on two or three cylinders. Every once in a awhile all four would kick in, but then it would go dead again. It turned out to be the injector connectors. Of coarse it me forever to figure it out.