Im new to this forum but have read similar postings about this same problem and hope to get some assistance as well. Truck is manual tranny and has 150k miles it started running rough then it just would not start - replaced fuel filter, cap rotor, plugs and did not notice spark from leads or coil. replaced and still would not start. then sent ecm to avpro who indicated it ran in their truck so they kept my 160 $ and sent it back. fuel delivery seems fine but i have not checked pressure. when cranking engine over no fuel is visible on plugs - have not tryed truck since i got the ecm back but when i reinstall the ecm and it still does not start what do i change next/? any help is appreciated.

 

Get a spark tester and see if you get spark.