Conversion to Single Turbo with Bully Dog Power Pup?

I'm writing this for my son who doesn't have internet right now. (So don't get too technical on me He has a 2006 Western Star, 550 CAT. After researching a lot he decided on a conversion to single turbo with the whole works, including the Bully Dog Power Pup.

It's been a week of nightmares. Expensive nightmares. The first test drive it was like a new truck--for about 5 min & then it derated. The 2 companies he's dealing with have been in constant phone contact & they've re-programmed, tried new sensors, re adjusted actuators, try this try that. Now it's not even giving codes......OMG!!!!

Has anyone had this trouble & hopefully fixed it? If so--what the heck was the problem????

Thanks

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Thanks a lot for your answer. Basically what happens is when I build 43 psi of boost pressure I can hear the turbo "unspool" and I can only build 30 psi of boost until I stop the truck and shut down the engine and restart it, then the truck goes back to full power until I induce a load that requires 43 psi of boost again, then it derates again. There is no Check engine light nor are any codes logged.

I have had it to several CAT shops and even they are scratching their heads. When it is hooked up to ET there are no logged events and no logged codes, however, every time that the truck derates at exactly 43 psi of boost, there is a status flag that is displayed in ET that says "Intake Valve System Starting" but the cat dealers have no clue...

 

that's the 1st time I've heard it needed a different head?????? And are you saying that even if that were done it would cause more problems? What problems? Have you been down this road?

 

Thanks for your post. It's an MXS. This would have been the 3rd turbo issue in the past year, so I thought this would be a good thing for me to convert as well as the big rig bully dog power pup....instead this is my worst nightmare
If you hear a gasping sound--it's me going under.......