Also check if you are released some air vacuum hose that go from the admission collector to some senses, it can also be the EGR valve that has been blocked and you are creating that fault.
Saves because of the color of the spark plugs you mention you have very little air in the mixture and a lot Ronpio and that is why he doesn't part, all that tells you the Scanner. It is better in the long run, since you will not change pieces to change.
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