vacum?, lines?, turbo?, maybe the injetors?

[tonsoffun89]

Well, every once in a while i would lost power make some black smoke. I would let off the pedal, and hit it again and it would be fine for a few days than it would happen again. This was for the last 5 months. It started happing more and more, now ever time i get on it it happens. I don't have a vacum tester but i put my finger over the line and theres alot of suction. I'm going to take a look at the lines today, when it cools off.

Also on start up theres one puff of white smoke, no ruff idle, or anyting like that. But yesterday it felt like the tubro shutdown, the truck was still runing but there was no turbo at all.

[ercaduceus]

I had a similar no boost situation. I turned out to be the wastegate sticking. Had to pull the turbo and spray penetrating oil on the wastegate pivot points. However before going though all of this I would check you vacuum lines and boost control solenoid. A cheap way to monitor your boost if you don't have gauges is to buy a cheap boost gauge a autozone or the like and using brass fittings to place the sensor in the manifold where your intake temp sensor is. If you use a "t" fitting you can also use the temp sensor in the same hole in the manifold. I did this until I got my gauge package and got relatively accurate boost readings and no change in the emp sensor readings.

Good luck,

[grancito]

I had that, turned out to be the boost pressure sensor failing under high temperature. I think that these, as well as the PMD, need to be relocated.

[tonsoffun89]

It has a new boost control solenoid. I'll look in the it sticking.

[tonsoffun89]

I don't think its thats, time to order the new tubro.:(

[chris.maxwell]

What is the boost pressure sensor? Where is it at? How do you test?

[grancito]

Boost pressure sensor is a black box bolted to the top of the intake extension. If it is faulty, you will get a code. I was wrong about the boost sensor failing, in my 2007 post, it was a false code that didn't come back.