I have a question. Does the cold make your fuel pressure drop or should I be looking at some thing else? I get 13psi at idle and 7-9 normal driving and 4-5 wot. I notice that some time when cold at idle it will go to 1-2psi for a second and then it is right back up.

I also keep getting a crank shaft sensor code when it is cold would that be a cold thing or do I need to change it.

 

it sounds like your lift pump is no good mine was doing the same thing, a new cummins pump cured that! cant help with the sensor sorry might check for clean and tight connections at the sensor its self

 

Thanks, I thought that might be the case i just hoped that was not it. I just got some gauges and now i am kind of paranoid.