Boost still disappers, help!

[turbowrenchhead]

I have been dealing with this issue since last year. I get up to 12 to 14 pds of boost and the gauge drops and i loose power untill I let off and reapply the throttle. It will stay steady at half throttle or so then when I put the throttle the rest of the way down it instantly disappers. Last year I wired the wastegate puck shut and it didn't disapper so this told me that i must be sticking inside the hole in exhaust housing.
So last week I had an external wastegate put on. I have steady boost with no controler on it but it only runs 8 pds of boost. As soon as I put my grainger valve on it same thing. I tried my air regulator in place of it and same thing. Then I plugged the outlet off the compressor housing and ran the controler to the map sensor line and I also replace the small lines with 7/32's vacuum line. Same thing. I cranked down my BOV and no change. Right now I took off my BOV and put a plate in place of it. I did this last year with the BOV and had no change. Now I'm grasping for ideas as to what could possibly cause this stange problem.

 

[DR BOOST]

remove and reinstall ALL of your intercooler hoses. mine leak above 24 psi.

 

[turbowrenchhead]

Did that no change. I took the car for a drive with the BOV off and no change. Someone told me that I might be getting a vacuum drop when I put the throttle all the way down and a vacuum tank teed into the boost lines would solve the problem. Tried that and no change.
Last night with no controler on it and 4 people in the car the boost disappered.
For some strange reason the boost stays when the car is still cold. For about 5 minutes. As soon as its warm then it happens. This morning I put the line going to the bottom of my gate to the top to keep the valve closed. The boost stayed till it got warm. Then when I got to 14 psi it disappered.
Someone want to buy a 84 t type???

 

[turbowrenchhead]

Called PT&E and they said to check the i/c. I have the ford powerstroke i/c with the plastic end tanks. Since the car only does it when its warm and the end tanks are glued to the body of the i/c, is it possible that an end tank is letting go and resealing? One would think that you would hear this large leak but I don't hear one.

 

[turbowrenchhead]

Finally figurered out the problem. I put a 3" piece of pipe about 8" long inside of my stock air intake about 12" away from the turbo. The intake when it got good and warm would get plyable enough to suffercate the turbo. It only took a year to figure it out. But I did it and no one else. I talke to Red Armstong, PT&E, John Craig. John from John's performance and I think there were a few others. Not one person was even close to what the problem was. So it works how it is suppose to work!