Do you know for sure your glow plugs are working??? I was having a starting problem each time I started my truck. After the first start it would be fine the rest of the day. This got worse as time went on. I'm running a Moose pump. So because I have a spare pump I changed them.... As I was removing the pump I found the problem. I had no power going to the glow plug controller. The electrical fitting from the fender solenoid had come unsoldiered. I made the soldier fitting so it was my problem. My wait to start lite burned for the usual amount too. This hard start problem had nothing to do with a fuel leak or return line issue. The moose pump was not at fault. Now I've been around these motors for some time. I really felt my problem was a fuel leak down issue....Nope... These motors don't start cold very well without the glow plugs working. BTW I used a test lite on all the glow plugs before I pulled the pump. They all tested fine...
