I have a 93 f250 with 7.3 idi & factory turbo manual, 133,000 miles. The issue i'm having is after it runs for 20mins or so (nice & warm) starter will not engage unless it sits for awhile. Engine Hot & Fuel Filter light also come on when turning the key forward to turn it over. Besides that it starts fine & even restarts with no issues within a 10min or so window. Idles perfect & runs great. I originally thought the ignition was possibly going but now i'm leaning more towards a sensor perhaps. Both batteries are brand new & starter checks out. Any help/ideas are greatly appreciated. Thanks!

 

starter solinoid on the pass fender? ohm out all the wirtes for high resistance?

 

Starter may just be gettin weak, or possibly there's a heat shield thats missing.

 

Alright so after a good amount of troubleshooting & testing/chasing wires I have a solution! The bushing on the clutch pedal was wore out causing it to not fully engage the clutch safety switch everytime. So no this was not heat related as expected at first.