on factory shift points, stock tune, stock pulley with intake and leaking ass pacesetters with a 2.18 60" i went 14.1 at 98mph.
either something mechanical is wrong with the car, or that place sucks at tuning.
even with intake, headers and rockers, stock tune and stock pulley on a 95* day with D/A in the 3500 foot range i still traped 96-97 and went 14.2.
i think you need to have a grand prix guy look over the tune.