I have an 87 where new ICM (ignition control modules) fail soon after they are installed. Some within a few seconds, but the latest in 1 yr /750 miles. These ICMs were OES parts with the Nissan part number. The car also has a new ign coil and crank position sensor.
The ground in the icm/coil wiring hardness checks OK with a multimeter, but I still will check the two physical ground points. The circuit diagram shows only these two ground points between the ECM and ICM. I have heard that frequently blowing icm's can be caused by poor ground in the circuit. Where/what else should I check ?
The ground in the icm/coil wiring hardness checks OK with a multimeter, but I still will check the two physical ground points. The circuit diagram shows only these two ground points between the ECM and ICM. I have heard that frequently blowing icm's can be caused by poor ground in the circuit. Where/what else should I check ?