I recently bought a 1988 Mustang coupe with 155,000 kms on it and on hot days sitting at a traffic light it will start to run rough and then stall. Attempting to restart it doesn't work for a few times but after a few minutes it will start and work fine for a few minutes then I get the same problem. The temperature guage reads below the halfway point and the fuel pump always works (audibly) when attempting to restart. I haven't had chance to check the TPS setting or the timing or anything but I believe It's either the coil getting too hot or vapour lock in the fuel lines. Any help is appreciated.