Well it all started fine when I pulled my truck out to move into my shop, but once out it started running rough, idling horrible, but at 4000 rpm it ran smooth. Shut it down to get my timing light, got everything hooked up, went to start it, no spark... So my question is, can anyone tell me how to shoot a distributor to find out if its my ignition module in my distributor (which I have already had to replace once). Its a 50 series Mallory distributor if that helps. Any advice or help would be greatly appreciated. And I do have power coming into my coil, do not know how to test the output without getting shocked. So like I said any help would be appreciated. Thanks!