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Update: I finally got the hang of reading injector cutout tests on our new scanner
For years, I just looked for the big drop in RPM on our old Snap-on unit and called it good. Last month, I was chasing a rough idle on a 6.7 Powerstroke and the old way wasn't showing me anything. I sat down with the manual for our new Autel and learned to watch the actual fuel trim numbers for each cylinder during the test. It showed me cylinder 3 was way off, which led me to a bad injector connector I would have missed. What's the one diagnostic trick that took you way too long to learn?
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leo_harris6mo ago
My old shop foreman swore by the "screwdriver to the ear" trick for finding noisy lifters. Took me five years to admit it actually works sometimes.
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clairefisher6mo ago
Honestly saw a YouTube short about that exact thing last week.
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