I replaced the spark plugs NGK platium plugs and replaed the vavle coveer gaskets because they where leaking, car has 120,000 miles on it. Then these codes come up P0300, P0303, P0305, P0016 and P0082. I then replaced the NGK plugs with Bosch Iridium plugs and cleared the codes. P0076 P0082 codes come up, want is this? Will the engines act any different if you unplug the cam position sensor when the engines is running?