Hello. I have a 1992 F250 7.3 IDI non turbo. I just bought this spring and initially in the cold weather (NY) she always started no problem. Now that it’s hotter out she has trouble hot starting. Cold starts on a dime no problem but after a medium length drive and I shut her off. I have about 20 minutes to start her again or she won’t start for about an hour when the glow plugs click over. Any ideas? Injector pump? Glow plug controller?