Well, my truck's intermittently dropping spark again. Here's the story: ~6 months ago my truck randomly dropped spark to all cylinders. At one point, the truck wouldn't start so I was able to try and diagnose the problem. The distributor was getting 12V but wasn't throwing any spark. I figured the problem must be either the coil or ignition module. I replaced the coil with a known working one and the problem persisted, so I replaced the ignition module. This fixed the problem until yesterday. The distributor is an MSD pro-billet HEI and is only a few years old. It really acts like the ignition module is bad again. I am going to send the module into MSD and see what they say, at least this one will be under warranty. My question is this: Is there any way my truck is killing ignition modules? Or does MSD just suck at making them? My voltmeter hasn't been saying anything unusual.