ok i just replaced my egr valve because on my 86 honda accord because the ecu showed it was bad so i replaced it due to the car running like shit and now it rins better at idle and everything but the same probblem persists but now if i slowlly rev it up when it get to 2 k it will bog down and have the same exact effect of it running on 3 cylinders could a bad spark plug wire cause this. please help.