[njk53]

Have you tried removing all of the switches, gages, etc. from the vehicle loop and try running the engine with the minimal amount of items needed to start the engine and run? What I am trying to say is it would be like runing the motor on a homemade dyno in the car. Bare minimum of items necessary to start and evaluate the motor to see if the miss is still present. This will help you to zero in on the engine components that are left or if the miss goes away, the fault is in the vehicle electrical system, gages, connectors.