To ensure that the test was fair, we had to make this distributor as good as new, or better. So, before it ever saw action, the stock distributor was treated to a new rotor, cap, and module.

The first step in replacing ignition coils is determining the type., Depositphotos Here’s How To Diagnose and Test An Ignition Coil Let’s do this!

The HEI’s integrated ignition coil in the distributor cap makes it the most compact ignition system in history. No external ignition coil to sweat out.

Read about how to install GM's Advanced High Energy Ignition electronic distributor in 4Wheel & Off-Road Magazine.