well it was sitting with a full tank of gas for all that time and i noticed today that someone must have taken the gas cap cause its no longer there, s for boost leaks it has polished greddy upper intercooler pipe and a greddy FMIC with hard pipes and an injen intake. there are nipples on the intake side that are not plugged up, but as for a leak id have to check. it also could be a fuel filter cause i last had it done about 9 moths to a year ago BEFORE it was parked. I also have the computer that they use from autozone to check engine lights and it passes with no codes.

As far as if it stutters or hesitates, id say it hesitates cause it does shake and vibrate but its harsh enough to snap your neck ! i drove it yesterday morning to work and it smoothed out about 15 min after it was already warmed up. then it felt like it was stuttering instead of hesitating. but it only hesitates from idle to 3200 rpm.