Hey guys quick question. I've been noticing something odd for a couple months now. When my pull out normal between 1100-2600 range rougly my car will bog in a way then in a flash just gain its normal torque i assume while steady 1/4 throttle. After 3 grand it seems to run fine. It wont do it when aggressively on the throttle. Also It's noticeable in 1-4th but mainly noticeable in 2nd. I saw other post similar posts about this issue but never ended up with an outcome. It's getting really annoying and can't quite pin point the problem. Car also seems to bog up hills and in general at times. No check engines lights. Just replaced my full exhaust from header back with 2 1/2 inch piping, new high flow cat, etc so i know its not the cat. Also replaced the plugs, but not the wires they seemed fine. New oil, filter. Are these symptoms common for a fuel filter or possibly dizzy cap? Maybe wires? It seems like everything i try is a lost cause. Thanks for any help.