Code 64 and 65 together?
ie the right side has a bad plug the ECM reads a miss as lean (HIGH Oxygen content) the ECM therefore says hey I need to add fuel (adds to both) the miss continues so adds more now what do you suppose happens when it 'balances' for the miss?
Datamaster allows I think 20 free runs so all you are out is cost of cable. Once you use Datamaster you will buy it.
Good luck
Jack


