A master tech in Dallas told me my diag process was lazy, and it stung because he was right
I used to just pull codes, swap the most likely part, and send it out the door, which worked maybe 7 out of 10 times. He watched me do it on a misfire job and said straight to my face, "You're guessing with a scanner, not testing." So now I always back-probe and check live data before I touch a single part, and my comebacks dropped way down, but man, how do you all handle it when an older tech calls out your shortcuts?