02 int. DT466 engine strong till warmed up! HELP!!

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61 months ago

Just bought this international 4300 DT466 from dealer used. Took it for its first long trip and felt it burp a couple times while on the interstate when I had gotten down to an 1/8 tank of fuel so figured it burped a little air in the line. had engine off while fuelling and drove off with full tank great for a mile then it started chugging so hard it couldn't pull it's own weight. Peddle to floor wouldn't rev above 1k.
So I bled and bled the fuel till it couldn't possibly be air in the line.
Shut it off for 20 minutes fired up great. Went less than a mile and it did it again. Let it sit an hour and it ran strong for a couple miles. Seems to be doing this once it warms up. Once it warms up it starts chugging violently until it can't run because it gets to a low low rpm and kills over. Before that its great. Runs like a top.

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