94 5.0L issue with keeping the engine running

[94stang5.0L]

Hello, i could use some advise. I have owed mustangs since i was 18. But im stuck on this one... i have replaced my fuel pump, fuel filter, gas lines to the fuel rail, ignition coil, battery (yellow top) and alternator ( upgraded to the 200 amp and 4 gauge copper wiring to the battery with fuse) ( i have a large stereo requires more power) however i can get my car to start, runs great for 10 to 15 mins. Then it just dies. When i go to start it again, some times it will start for a few mins most of the time, it wont start again. Can anyone help with what the issue is? Voltage stays at 14.1. I have not been able to find a code reader for my car yet.

 

[General karthief]

Cranks OK, but No Start Checklist for Fuel Injected Mustangs

Cranks OK, but No Start Checklist for Fuel Injected 5.0 Mustangs model years 1986-1995 A word about this checklist before you start: it is arranged in a specific order to put the most likely failure items first. That will save you time, energy and money. Start at the top of the list and work...

www.stangnet.com

You do it step by step, don't skip around, you also need to pay attention to the highlighted type for the 94-5 specific stuff.
The code reader is the same one for the fox, the plug for it is on the opposite side from the fox.

 

[94stang5.0L]

Thank you for the info. I will start working on it today and try to provide updates as I go. I will make sure to go in order. Thank you again for the help.

 

[General karthief]

Take notes, it helps me when I do those tech things