Chevrolet Repair: 1990 beretta that doesnt want to run, beretta gt, full tank

Question
I acquired a 90 beretta gt w/the 3.1L engine that did run at first, a bit rough, but it did sit for a year before it came to me. It had a full tank of gas, so we changed the oil, fuel filter and added octane booster to the tank. Its barely ran since. It starts, runs very rough, then dies if you touch the throttle. I pulled the plugs and saw no sign they were the problem. The fuel pump has plenty of pressure and were stumped. Also, since pulling the plugs today, its not firing at all, im hoping a plug wire just didnt get put back on tightly enough. Any suggestions?  

Answer
check your ignition coils. you have three of them one coil has two connectors. only bad thing is if you loose one cylinder, you loose both on that coil. i think if you can find one miss, youll find that the other cylinder that shares that coil is missing to. and that will cause the stall out every time you touch the throttle. good luck, and if you have any more questions, please ask and ill try my best to answer.