Hello guys I'm new to this forum i have a 2004 case 580 super m backhoe machine has 1700 hrs on it I went out to run it one day it fired right up but after letting it sit running it started tapping loud and the machine could hardly move it started blowing blue smoke and would keep tapping. So I figured water could be in the fuel so I drained and blew the tank out and replaced the fuel filter still the same thing I took the valve. Cover off to make sure it wasn't a bent push rod it wasn't could it be injection pump any help would be great I need this machine for snow removal thanks