76 Ford F100 Ignition troubles

[corkel]

Hey folks. I have a 1976 Ford F100 with a 302 and my problem is sometimes when my engine is running and I try to cut it off, it continues to run and the only way to stop it is to jerk the coil wire off. This is an intermittent problem. Happens about every 6 or 7 times I drive it. I have replaced the ignition switch and still have the same problem. Pretty sure it is some type wiring or ground issue, just need someplace to start. Thanks in advance.

[fordchris47]

check your starter solenoid

[jf100]

Did you replace the key cylinder and all?