no fire

help Im desperate I took the motor out of a 96 chey lumina car and put into a 98 grand am 3100v6 sfi and took all sensors and put into the 96 motor and put the computer from the 96 into the pontiac and still no fire it turns over and gets gas someone said something about reseting the computer Im loss on ideas

Did you swap in a V6 to replace a V6 or the I4? If it was a I4 probably the fuel pump not putting out the required fuel pressure? All sensors are connected? Did the engine run before you installed it?