Problems: rough idle and cutting out
Recently aquired a 68 cougar with a 351 windsor. Ran great for a couple weeks. Now after starting, it idles fine for a couple seconds(30 maybe) then the engine starts shaking as the rpm's go from 1000 down to 0 and jump back up. during this time I can keep it running if i get it up over 2000 rpms? The weird thing is that this just happened one day, took it out the day before with no problems. I checked all the spark plug wires and they haven't been knocked loose or anything, it almost seems like it's missing a cyl or two when it's happening. Anything else to check other then pulling the plugs and replacing the wires, which i need to do anyways?