hey so i have a 96 dc2 gsr with a jdm h22a, running with a P0-6 ecu (guessing that its chipped to a p28). now the problem is that when the throttle is constant like on the highway or what not the car jerks, either the throttle body/ intake manifold or ecu is cutting off. the car still has plenty of power and still engages vtec which is really. the speedometer was working fine but now doesnt work. the vss is fine, i dont know if its the cluster. any help?