A couple of months ago, my 1995 Mustang GT began having problems. Sometimes it would start right up, and other times it would crank but not start. After leaving it sit, it would start. This began happening more often. I have replaced the cap and rotor, ignition module, ignition coil, and the ignition switch. Sometimes when the key is in the ignition, and the door is open the car will ding to indicate the door is open, then the dinging stops. PLEASE HELP! Any advise would be greatly appreciated. Thanks in advance for your prompt reply.