2.8l crd start issues.

[cmf0205]

So I have an 06 2.8l crd love the vehicle but I ran into this nightmare I'm trying to solve right now. I broke down an hour from home last week and haven't been able to get the jeep to start since. To start I replaced the fuel filter, starter, and battery. The jeep cranks for about 30 seconds before completely killing a fully charged brand new battery and the cranking is very lack luster if I do say so myself. It will sputter a few times but it won't do it consistent enough to start. My questions are 1. Why is there so much draw it is killing a 800cca battery within 30 seconds of cranking. 2 why wouldn't it start if I can see that there is fuel pressure at the high side of the injection pump

 

[seafish]

The jeep cranks for about 30 seconds before completely killing a fully charged brand new battery and the cranking is very lack luster if I do say so myself.

NOT enough info here but it mostly sounds like it could be a bad crank postion sensor!!!

Did you also check for actual fault codes before throwing parts at it??