1992 Taurus still wont start

I have a 1992 Ford Taurus that has 112,000 miles.
Every now and then it dies while driving it and sometimes will not start. It is a very intermittent problem and hard to find. I rarely drive this auto, my son does. I finally got it to where it would not start and pulled one of the spark plugs to check for spark. I had no spark. It seems to be worse in warmer weather, in the mornings when it is cool we usually don't have any problems with it. Could you please give me some direction to go on. It has a new alternator. I thought about changing out the computer in it but neither the parts stores nor ford dealership can match the model number on the computer. PLEASE HELP Also there are no codes

I was contacted by a tech and told that a new ignition module would fix the problem. I tried it but still have the same problem. Any input to this problem would be greatly appreciated.