Not sure what’s up. Truck won’t start every time! Turns over but won't start. Some times it won’t start when I first try and will start on later attempts. Sometimes it’ll start right up and then won’t start later. Sometimes it starts every time. It eventually starts, usually after a 5 to 10 minute wait. Distance driven doesn’t seem to matter because I can drive 5 to 155 miles with same problem. Just started doing this three to four months ago. This truck is not a daily driver but is usually driven at least once every two weeks. I bought new CPS and put on with no change. Fuel pressure is 60 psi and HPOP pressure is 2000 psi at start according to gauges. I've noticed very small amounts of smoke at exhaust when it doesn't start. Once it starts it runs and pulls fine. Got modified IDM about one month ago, but problem pre-existed this mod.