Well i have done tore this truck apart and still cant figure it out,maybe someone can tell me somethn to check that i have missed. It will crank and run fine then it may run sluggesh or if u try to get in the throttle it will just bog but if u back off and ease into the throttle it will go pretty good,but then a minute later it will run fine.But this is where it gets good,it will start to jump and buck and everything else and just cut off,and u may crank on it for an hour or a minute and it will crank back up and u may drive a mile or a hundred miles and do it again. done changed CPS 3 times,no good,checked for codes and dont have any,changed fuel filter no good,put another computer in it and didn help,i put a guage on it to watch the fuel pressure and just sitting in the yard and when it starts runnig bad and cuts off the fuel pressure is still up. I am just absolutely lost is there somethn somewhere im missing? This is an OBS 350 to.