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I have the same issue on my 96 Crew cab 3500 7.5L. Starts fine cold but warmed up it is hard to start if it sits for more than 30 minutes after shut down, On another thread someone said to check the coolant temp sensor. I am going to replace it since it is easy to get to and won't cost an arm & leg. Checked fuel pressure and it checked within specs.
Kinda a beginner but someone said there problem was the starter soaking or it could be a weak fuel pump although you said it was within specs
Have you heard of many new mpfi spider sets having a fuel regulator go bad within about 500 miles im just wondering since my 5.7 is doing the same thingThe "hot start issue" is usually caused by a failed fuel pressure regulator. I know several other L29 owners on this forum have diagnosed and fixed this very issue, including myself.
Have you heard of many new mpfi spider sets having a fuel regulator go bad within about 500 miles im just wondering since my 5.7 is doing the same thing