Air filter obstruction gauge has never moved. There was a post (CWH2?) about running problems and found air filter plugged. I thought it probably was time gauge be damned.
Yeah... that was probably due! Weird that the gauge didn't move. What symptoms did you see?
The tricky part with the diesel is that you can pull a fair bit of air through a dirty filter. So your daily driving stuff works fine, but then you hook a load up to it, and the turbo tries to spool up and.... can't. At least that's what happened to me.
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