7.3 idles for 10-15 minutes and shuts down wont start
 

2001 F350 7.3 liter threw a rod at 189000 replaced motor with T444E replaced ICP, IPR, IDM, fuel pump and test the ECM out on a '99 7.3 that ran with no issues. Also changed the oil and fuel filter. Truck will run if RPM's are kept around 1000 or more for more then 1.5-2.0 hours when RPM's go back to idle, truck stall and will not restart until totally cooled down. Any idea will greatly help thank you.

Is the coolant getting to the engine?

I am not sure I believe it is but I will have to look into that. I have had it running for almost 2 hours last night with my foot on the throttle keeping it around 1000 RPM or greater and had plenty of heat blowing from heater and no over heating issues

May sound funny but I had a dodge Dakota that did that. It was the crank sensor.. Lol idk if it would be the same or not

I'd still check for any coolant leaks maybe, and have you run a diagnostics?

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You might want to throw a new cam sensor at it too.

Thanks for the thought I replaced the cam position sensor too:argh::argh:

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I have run multiple scans but no code show up.