My l4400 died on me the other day. After looking around at it I noticed the fuel filter was dirty so I changed it. After that for a week I had no problems then I got on it one day and it took hitting the glow plugs to get it to fire and mind you it's 90° out. But after a time or two it started right up. The next time is 3 or 4 tries the next time there's four or five tries and then I noticed when it was running and starting to die if I kick the key back to the glow plugs heater it kept running for another second or two and I turn it back to run and it kept running. Currently that's how it says it now takes 30 seconds or so maybe a minute for two stay running after doing the back and forth with the key but I like to figure out what the problem is any ideas.