What causes my to have less poer when its cold? I know all diesels do this, just curious as to why.
Thanks!

 

Diesels rely on compression and residual heat for combustion, so until some heat gets built up in the cylinders, the fuel isn't burning 100%. Also on these PSDs, the injectors run off the high pressure oil, so I imagine the oil has to heat up a little to flow easier through the injectors. That's just my guess anyway

 

Also the ebpv could be closed tell it warms up.

 

Both of the above answers play a role in the loss of power when cold, but the main reason is for safety. The PCM makes adjustments(such as timing) when cold because cold/thick oil cannot flow as well as warm oil through the HPO system, injectors, and everywhere else that relies on it. The PCM monitors oil temp via the EOT sensor and will adjust values according to the temperature. Once the oil is at operating temp you should have full power.

 

Thank you guys! I know it was a basic questions, but this is my first diesel. Nice to know whats going on and I need to read up more on these motors.
Thanks!