Clicking noise

I did a tune up and to get to the spark plugs I had to take the fuel rail off. When I took off the rail one of the injectors was stuck in the intake manifold. I took it out and saw that the plastic tip part was cracked/brittle. So I replaced and put a new injector in. I have also noticed that those where the original fuel injector to the car and no one sells the original one. So the one I got was the one for the vehicle but aftermarket. I installed and now the car is making a clicking noise and hesitates when accelerating. Please help I am stumped. I changed fuel filter, air filter