My truck started having issues a couple days ago. It will take three or so times cranking before it will start. And when it starts it idles really low and almost dies but saves its self and continues to that over again before i start driving. Engine was rebuilt by previous owners years ago. And I recently replace the fuel injectors and fuel filter. Since then it still seems to still be sluggish and shakes like it has a miss. In the last couple of days I have checked the fuel pressure and it is working good. I have also tried to find a leak in a hose somewhere and haven't found anything. I also have a good airflow. When I get to stop signs or red lights it barely can get going with out stalling out. I am very confused because I cannot think of anything else. Please help!!