What should i look for when my car wont start (sometimes)

When was last time you had a tune up maybe fouled spark plugs not firing all the time but there is some maintenance things you can try like check air filter, clean throttle body replace fuel filter if have not done so in a while add fuel injector cleaner to gas tank and use middle grade or high test gas to help clean out gum and carbon build up.

If you have spark it is likely a fuel problem. When it won't start check or have checked the fuel pressure. It is possible that the fuel pump relay or the fuel pump is the problem.

It does appear the condition is heat related. The coil on the vehicle is pushing twenty years old. Check the resistance, both primary and secondary when the condition occurs.