i have a kia sedona 2.9 diesel 2004 it does not start unless i use easy start?

[sedonia k]

I Have A Kia Sedona 2.9 Diesel 2004 Model It Will Not Start Uness I Use Easy Start It Runs Perfect Otherwise I Changed The Heater Box Because I Thought This Was The Problem But It Still Wont Start The Manegement Light Is On. Someone Said I May Have Air In The System I Have Bled The System And I Must Say When It's Running It Is Great But I Still Can't Find The Problem If Kia Made A Manual For This Car I Would Fix It In A Flash Can Anyone Help Maybe They Have Had The Same Trouble. Can Anyone Put Me Inthe Right Direction To Sort This Out Thank's