I run a small service department, seen a few gems over the years. There is no way anyone can work in this industry and still have faith in humanity.
-Remember those "tornado" air filter inserts? Found a homemade one (as in a bit of sheet-metal cut with tin-snips and bent into shape) stuck in someones MAF
-Had a kid that drove his car off the road, over some rocks, bashed a hole in the oil pan... then drove it home... One less VR6 Jetta on the road now.
-Just yesterday we had someone drop off a Dodge Caravan who wanted the A/C lines to the rear A/C unit replaced (big job). Do you want us to diagnose it? Nope, just do it. Guess what buddy, the lines weren't your problem.
I also do Emissions testing, on 1996 and newer cars it's just a simple OBD test, so we know that if the MIL is on they're going to fail. I try to be nice and tell people before we do the test, you wouldn't believe the grief I get. "No that's not because of an emissions problem, I just need an oil change" or "my mechanic told me it was just a sensor and I shouldn't worry about it" or "The kid at autozone told me is was a o2 sensor so I replaced it but the light is still on" Ect...
Yet somehow it's my
fault when they fail
I can't wait to get out of this industry...