I recently just put a pi motor in my 96 gt and have a few problems. The first one is my throttle response just dont seem right. It has a bbk throttle body on it and it just dont want to rev quick. The second problem is at about 3000 rpm it feels like the power kind of flat lines. The car has mac lt's, h pipe, flomaster, 410 gears, cai, and bbk throttle body. I dont know if a sensor is bad and not throwing a code. I dont know what to look for to diagnose these problems. Do you think i need a tune and if i do which would be better a handheld programer or dyno tune.