02 F-250 SD with 5.4 - Cylinder 2 has oil on the plug but compression check is 142 psi all other are 150- 160. The truck has zero trouble starting and sounds quite when running.

When I first start my truck it will make a huge cloud of Blue Smoke then it will Idle rough. Wait 10 min or so and the tail pipe will stop poring out blue smoke and be normal, no color tail pipe exhaust. Still having a rough Idle though. The truck will run fine if I keep the RPM under ~2500 but still be rough and have no power. Go full throttle and the truck will bog down and start vibrating like a kid playing with a toy machine gun but no smoke will shoot out the tail pipe. I had a car follow me to watch for it. If I take the truck up a hill and the rpm goes over ~2500 then a light blue smoke will appear until I get off the hill and the rpm drop then back to normal exhaust. Get home still rough Idle. Park it and start it ~5 min later no smoke. Park it and wait 30 mins or more and the entire block will fill with smoke. This cycle keeps happening.

What do you think is wrong?

 

valve guides and seals..

 

The full throttle bog sounds like a clogged catalytic converter.

 

What both the above ^ posts said. The bad valve guides and seals caused the spark plugs to foul and cats to plug up. Do you have a check engine light How many miles?

 

any filter.. air, oil, fuel..

does its best filtering just before it becomes restrictive...

real TEST data is difficult to come by..

 

No check engine light ever. I think my trucks ability to show that light is broken. The light does turn on when I put the key in run. Goes off when running. My obd scanner shows no codes and no pending codes. 142000 miles.

I know the problem now though. I have a bent valve somehow. Used a endoscope that can look at multiple angles using a mirror that clips on it. It is crazy though that my compression is so high with a bad valve!

The oil drip is slow but i seen it on the scope. It kinda fills the cylinder which is the crazy blue smoke after sitting. But don't smoke while running because it is not dripping fast enough to be seen at all times. The higher the rpm the more oil that shoots into the valve cover and instead of dripping into the oil hole it drips past the valve seal and into the cylinder.