Unfortunately, it could be any number of things. Electronic components often fail when they are hot but function perfectly when cold. Fuel delivery systems often react differently when hot than they do when cold. I always advise people to look to the basics if an engine isn't running at all: fuel, ignition and compression. Make certain that the engine is getting fuel. A quick test can be to shoot a little starter fluid in the intake while an assistant cranks the engine when it refuses to start. If it only runs while starter fluid is being introduced, you have a fuel problem. Pull a sparkplug wire, put an old sparkplug on the end and set it on the block somewhere. Crank the engine when it refuses to start and watch to see if the sparkplug has a spark. If not, you probably have a problem with the electronics. All you can do is narrow it down a little at a time like that. Good luck.
The Ford Mustang GT has a V8 engine, while the Ford Mustang has a V6 engine.
The 1985 Ford Mustang wheel base is 100.5 inches
The 2006 Ford Mustang has a V6 engine.
The 2014 Ford Mustang has a V6 engine.
The 2011 Ford Mustang has a V6 engine.
The 2003 Ford Mustang has a V6 engine.
The 2001 Ford Mustang has a V6 engine.
The 2010 Ford Mustang has a V6 engine.
The 2008 Ford Mustang has a V6 engine.
The 2002 Ford Mustang has a V6 engine.
The 2007 Ford Mustang has a V6 engine.
The 2009 Ford Mustang has a V6 engine.