Fuel Problem i think? Need Help???

Fuel Problem Need help????

I have a 97 gt and i went to school and my car sat for about 8 months. I went a couple weeks ago and put some 3.73's in it and was driving around and the engine started to jerk a lot when crusing around 3,000 rpm. Also when i stepped onto the floor the car didnt seem to pull well in the higher rpm. I think it might be a clogged injector because i didnt use and fual stabilizer before garaging my car. I changed the fuel pressure regulator to an adjustable one and set it to 40 psi. ANY IDEA's . Thanks