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2002 Mack Ch 427 6-4 code stalling issues


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I have a 2002 CH 600  with a 427 it has started with this problem of not  starting or stalling when driving and sometimes starts right up and today it would not start for 45 mins and sometimes run for weeks with out an issue

It shows codes 6 and 4  and the dash displays No Info it died today sat for about 45 mins fired and I was on my way . Could it be a bad ECM? overheating cooling and then starting back up when it cools down?  I have posted this before and have cleaned all grounds and my isssue continues   I don't think its a harness problem any and all help would be great thanks in advance Thanks Sick CH

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