I have a 2006 ford LCF with a 4.5 power stroke that we have been Having starting problems with. The engine won't start right away when cold it has a long crank and you have to cycle the glow plugs twice before you even try to start it. Once it starts it has not power until it warms up. You can hold it on the floor and won't turn up past like 1500 Rpms under a load. If anyone has any advice as to what the problem could be please let me know.