a buddy's 07 6.0psd has a few issues. the truck has a noticable lack of power, struggles to gain rpm and just runs bad until it gets up to operating temperature. There are no codes stored in the computer, the fuel filter is clean, as is the fuel/water seperator. any help would be greatly appreciated. truck all stock and runs 15-40w oil..

 

I just had similar issues and dealer replaced injector #4. Not really a whole lot of info given to go off of... could be a few things. A cylinder contribution test would be nice...

 

google tsbs for this truck they had a recall to recalibrate the pcm for cold start conditions