2016 SVL 95-2s skid steer cranks but no start. Was running then quit. We changed fuel filter, drained old fuel and refilled with k own good diesel. We've purged the air procedure and all we are getting is crank, start for 4-5 seconds then it quits. This is an improvement, however, it just doesn't keep running. Any suggestions to help us get this thing started.? It is the 3.8 engine. Any other info I can provide