My RV losses power just about 10 minutes after start up. If it's completely cooled down it may last for a half hour. I have changed the fuel pump and filter. When it losses power it starts bucking and backfiring but once I shut the engine off and restart it goes for about 10 minutes before starting to act up again. Any ideas?

 

Check for codes if there is a CEL and check codes if there isn't. Could be a plugged cat or egr issue

 

Sounds like a symptom of the ignition module going bad.