I have been working on my 89 S10 Blazer 4x4 4.3L this past weekend trying to get it back running. So now I have figured out that inside my distributor, right underneath the rotor has broken. From what I can tell it is the breaker plate but not sure. Its the part that goes over the pickup coil to protect it, and that is what I need to replace since it has exploded out the housing and cracked the plate. Does anyone know what this part (or parts) is and how to replace it?

 

I know the ignition module is where you describe. Does it have electrical connections on it?

 

Not on the broken piece but right under it from the pickup coil there's connections. I also think it's the breaker plate that cracked into pieces and it also blew out the housing a little on one of the sides. Is there a way to take these off without having to remove the entire distributor? I will upload pics when I get a chance

 

I think you can pretty much take the wjole upper part if the dist apart without pulling it. I would pull the Ignition Module and have it tested at an auto parts store. They have a special tester. Have them run the test several times.