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ive tried everything so couple days ago i went to start my truck and for some reason it cranked longer then usual then then finally fired up when it did it puffed out white smoke then black behind it.... didnt think any of it then the next day after the truck sat for a bit it did the same exact thing so i was like ok something is up.... i did some research and realized there is a oil drain back valve in the bottom of the oil filter reservoir so i changed that it seemed to be good for 2 days then back to doing it again what else could be causing this issue it just seems like the low pressure oil isnt staying filled so it has to "re prime" the system on the low side and then it fires right up... im a mechanic by trade so im not worried about what works needs to be done im just at a loss right now what could be causing it thank you in advanced for the help!!!
Sorry meant to put info completely slipped my mind
2003 ford f350 244,216 miles on it
Brand new injectors from Warren diesel just installed 2-3 months ago havent put a ton of miles on it since injectors put in maybe 500 miles tops only have driven to few other places only work 5 miles from home new injector cups put in with the injectors
Head studs head gaskets also installed at the same time
New oil feed lines on both sides new icp installed as well
All installed when injectors got put in
Just put a sct x4 tuner on it never put it on the hot tune just tow tune tunes were made from Matt's diesel performance