I posted something before but I messed up the video post. Basically I have a 95 9000 2.3t... was an LPT but I converted it to a FPT... I have replaced every vacuum line, and tried two different good BPCs, I also tried a calibration run today to no avail. Basically the boost goes up perfectly to 16-17psi then suddenly bounces back to 10 psi then up to 15 down to 10 up to 15 and so on. I have included a link to the video of my boost gauge... its a highway run in 5th at WOT. What else could be causing this type of fluctuation?? I'm at a loss....
Video: http://youtu.be/_nE44AsSS_U
Video: http://youtu.be/_nE44AsSS_U