Before, when I started up in the morning, a few seconds later you could hear the exhaust change from a low tone to a higher pitch when the turbo started to spin. This was at idle in the driveway.

Now the exhaust pitch never changes at idle and when I start to drive there is no boost until I start to accelerate. The VGT on my scangauge II shows like 14 until the boost starts and then is 85. Once the truck is moving it drives fine with plenty of power until I shut it off again. The next time it starts it does the same thing. I am now throwing a P2263 code. The truck runs fine with the code and nothing changes when I clear it. The code will stay cleared for a few days sometimes or come right back other times. The CEL will also go back off sometimes, by itself, as well.

Is my VGT just sticking at start up, or am I looking at something else? If it is the VGT, can I clean it or do I have to replace it?

 

delete my response, sorry.

 

Any ideas?

 

p2263 -- MAP hose, MAP sensor, CAC system leaks, Intake leaks, EP sensor, exhaust restriction, exhaust leaks.

You should check for all these things. Map hose and the intake nipple it attaches to can get plugged or the MAP sensor itself could be bad. EP sensor tube could be plugged. turbo hose split or intercooler split.

 

I had already looked up the code possibilities. I was hoping with the symptoms someone might be able to narrow down the search.

 

That's pretty narrow. Shouldn't take more than 30 minutes to check it all. One way to check the MAP sensor is to take the tube off the manifold and blow into it to see if the sensor responds. I don't recommend using an air hose unless it's LOW pressure--<30 psi. You could do the same thing with the EBP sensor.