BLK JDM

I think somethings wrong with either the fuel system or ignition system. When I'm driving at constant speed the car bucks. I have an Air/Fuel Ratio guage and it just goes crazy when the car is bucking. When I'm at full throttle the car kicks back for a second then jumps forward. It is not instanteous as it should be. I've heard it could be the fuel filter being clogged, then I heard it was the cap and rotor off the distributor, now I'm hearing it's the injectors and fuel pump. It doesn't run like this all the time, but most of the time it does. Some times the bucking from the motor is harsh and people looking at the car can see it but most times it's minimal. Please help. I'm lost at what to do or do I have to do it all. Has anyone had this problem before? Thanks in advance for your replies.

Chris y0!

change the fuel filter and run some NAWWWSSSS fuel injector cleaner!