6.0 power problems

[stcarroll568]

First of all, I want to thank the members of this forum for a wealth of great information that has helped me tremendously. My 6.0 has had some boost/power problems lately. The first thing I did was replace the VGT solenoid, which was the problem the last time this happened. No change in the truck. So, after reading a lot of stuff on this forum, I took the turbo out and cleaned the vanes and housing per the Diesel Technician Society web page. Turbo cleaned up well, but the shaft play was over tolerance. Hunted around and found a place to order a rebuild kit for it, put in the new bearings and the shaft play is now in tolerance. Put it all back together, and the boost intermittently is not there, as in it'll go like all get out and when it shifts, it falls on its face with all kinds of popping noises that sounds like popping back through a carburetor, with a big cloud of black smoke. I have never had a check engine light, and I don't have a code reader that will work on a powerstroke. Any suggestions? Thanks.

[alwil]

Did you do the VGT relearn procedure?

[stcarroll568]

What's the best way to do that? I had the batteries disconnected for a couple of days, and I let the truck idle for about a half hour before I drove it the first time after all this work.

[alwil]

I have it on my other computer, if nobody beats me to it ill send it to you later.

[stcarroll568]

Thanks, I'll be looking for it.

[headviking]

Originally Posted by alwil

Did you do the VGT relearn procedure?

How about posting the relearn for all to see.

[rocky1074]

KAM (keep-alive-memory) reset & VGT learn procedure
1. Drive the truck until the engine and transmission have reached normal operating temperature.
(The VGT learn procedure requires that the oil and coolant temperatures be at normal operating temperature)
2. Flash truck back to stock (Only need to do this if running a tuner or module)
3. Turn on the headlights
4. Disconnect both batteries
5. Short out + to - battery cables to each other (Make sure both batteries are disconnected before doing this).
6. Let truck sit like this for 10-minutes
7. Turn off the headlights.
8. Re-connect batteries
9. Cycle the key to the run position twice. Pause in the “ON” position each time until the wait to start lamp goes out (minimum 5-seconds) and pause in the “OFF” position each time for 10-seconds to be sure the PCM has "gone to sleep".
10. Start the truck and let it idle for a minimum of 5-minutes at normal operating temperature. This allows the PCM to learn the EGR valve closed position value. Also you will likely hear the turbo pitch change several times during this period as the PCM learns the necessary duty cycles for accurate VGT control.
11. Complete the road test Drive Cycle:

15 miles of mixed driving (*should* be enough in most cases) to allow the PCM to "re-learn"
its adaptive strategy. Note: Anytime the batteries are disconnected, the PCM will throw the
P1000 code until the “Drive Cycle” is completed. As for the Tow/Haul mode, the transmission
must re-learn your driving style and loads hauled again as this was cleared when the truck was
re-flashed.

[headviking]

Thanks for the relearn procedure.

[rocky1074]

Hey no problem...That's what these forums are all about...To HELP each other when we can...Have a good night!!!

[stcarroll568]

Thanks a lot, I'll let you know how it worked out.