I recently had a couple of situations where my ’93 7.3 would not restart when hot. Glow plug indicator worked ok and the starter turned the engine over plenty fast enough that it should have started. If I waited a few hours, it would start right back up. I brought it to the shop thinking maybe IP failure (185,000 miles on the clock). The next day, the shop calls to say the engine wouldn’t turn over and did I know I had a battery with a bad cell? I knew I was having to keep the truck on a trickle charger so the news didn’t surprise me and I said put in new batteries. The next day, the shop informs me that the alternator is not putting out more than about 12.3 volts. So we replace the alternator. Next day with batteries and alternator replaced, they try to replicate my hot start problem but after 30min idle, no problem. Long idle and then drive on the road for a while, still no problem. They said they kept trying but no issues. I’ve had it back for a day and the one hot restart I tried had no issue. I can’t think of a low voltage issue that would prevent a hot restart if the engine cranks fast enough - which was the case despite the low voltage/bad cell. What am I missing? Is my hot restart problem solved or is it probably still there waiting for an inconvenient time to resurface?