Hi all, I have a 2004 XR6T with a BFMKII motor that has a flash tune (tuned on dyno by a shop in syd) that I've run both the included 8psi and 11psi tunes on the XCAL3 that came with the car. I started to feel that the car would pull harder every now and then and be sluggish at others on both tunes. I have since installed a boost gauge to monitor the inlet manifold pressure to give me an idea of what could be going on. 11psi tune - First time I boot it, the boost runs up to 14psi and then settles to stock boost (6psi) and then maxes out at 8psi after that. I also notice that in slow traffic or drive-throughs the temp gauge rises to a bees d!(k below half way. 8psi tune - prefers to run at 6psi, until I do a rolling wot and it will boost up to 8psi. the temp gauge does not run as high as the 11psi tune. I am also slowly losing coolant. It has never gone below min however. I'm hoping its just tune issue... Looking for some ideas on what the possible issues could be so I can start fault finding... got a lot of experience with N/A however this is my first car with forced induction... Any help is appreciated