Skyline, has this car ever had a P0107 or P0108?? If so there is more info about the MAP sensor. But check your battery condition first, then I would check for vacuum leaks, and make sure the TAC relearns and completes the process. Also check the MAP values with your scan tool. This should help find clues.
Thanks for your replies!
No I've never had any p0108 or p0107 codes.
So i'll do the relearn thingy and hope for god sake that could be an issue.
I've been on that problem for a while now...