Hello all......how can I alter the temp at which the fan cuts in and can I also set to when the fan cuts out, using tunerstudio.....thanks

Depends which output it's programmed to use for the fan. IF it's set up as fan control you just find the fan control option in tuner studio?!

Extended, output port settings.

Then find what output you have your fan relay wired to, threshold is a set temperature and hysteresis is the temp either side of the threshold that it will come on and turn off

Look in output port settings. May well be FIDLE unless you are using a two wire idle valve. Just change the temps to suit.