I have a 98 stang v6 with the 3.8. And I sometimes have problems starting it when it's hot out. If I start it cold it runs fine but when it sits out in the sun for a short time and it's hot out, it'll crank but not fire up. Iv been told it could be the ignition control module. I did put in a cold air intake in it a few years back, but not sure if that could cause it..
Any ideas?

 

Welcome to the forum.

Sorry I'm not familiar enough with your year Mustang, but If you start a new thread in the Tech section for your year car, you'll get alot more responses. This section is just for new member intros.

Good luck