[ModifiedPONPON]

Just picked up 94 formula LT1 today. Showed it off to all my friends first of all. Burned em through first chirped sec (auto tranny). Ran fine and pulled hard all day. Finally showed it to my dad after dark and went to show him the performance and car suddenly studders at 5k and shifts to second and pulls hard and studdered at 5k again? It has 107k miles and not sure of car's history. I have a 10 sec drag car and a 73 formula that i've wrenched on quite a bit. Just not to familiar with fuel injection yet. Where would be the most likely place to start looking for the problem? thanks mike