just got my howell fuel injection installed and it seems to be not right....when getting into the throttle and letting off the jeep dies..flat on its face and stalls...if you let off the throttle easy it will stay running but it will be rough and then eventually smooth out....local 4x shop said that its not working properly because of the cam in the 258...its a bigger cam then stock and has a slight rumble to it, but nothing radical by any means