hi ihave a 1989 ford thunderbird sc the problem is that it will just die for no reason i never know when this will happen and when it does die some times it will start right back up and then sometimes it does not it may start up in a few hours or in a few days never know no patteren i have taken it to to many shops to metion and spent tons of money and still no answers it does not show any codes when hooked up to those machine they say it could be a modeula?(?) but don't know which one plz any help would be great as i can;t drive it the way it is and can't afford any more guess work thanks carol