Hey jpgamboa,So last week, I was messing around with my tuner, and set my drive idle to 922rpm rather than the default 572rpm, and realized that it eliminated the rattling under on my exhaust due to a broken bracket.
Just last night, I ended up blowing the gasket next to my thermostat, and some small hose, similar to this. I was wondering if I blew that gasket and hose due to my higher drive idle rpm, or is it just normal wear and tear?
Sorry to hear about the trouble you're having here but I don't believe that this in relation to the tune and it's sounding like this is regular wear and tear. My '01 Bullitt ran through more thermostats than I can count and I would have it checked out locally if you're able to do so!
Just to help diagnose a little... How many miles do you have on the car? Did the hose look like it was dry rotted? How about the gasket? It could just be a coincidence. Setting the idle that high shouldn't be that bad. Did your temperatures spike or did everything look good when the hose and gasket went?
Let me know if you're to have any other questions and I'm here to help!