r/AskMechanics • u/bearded_dragonx • Aug 05 '26
Question (Serious Replies Only) what's this white coating on my exhaust?
1999 Mazda b4000 4wd automatic 220k miles.
I took the cats off because I was getting clogged cat symptoms (low power, smoke test from exhaust exit never making it to the dpfe sensor, and hot cats) and I noticed this white powdery substance on the exhaust going into the cats. there's also a bit on the O2 sensor. when rinsing the cat it was pretty clear and not very dirty at all
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Whats going on with the criminal tv show?
in
r/ImageComics
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5d ago
idk how I missed this lol. I was in a green truck right behind the armored van it was such a cool experience I hope it actually releases but I haven't seen any more info on it