checking air filters

[Bob & Carol Howald`]

Dave That's oem on my 93pt also oem on my Dodge diesel truck. Bob
93pt-40



In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
wrote:
>
> How do people test their air filters? My European Mercedes
motorhome had a nifty feature.
> It had a vacuum operated piston in the intake. When the air filter
go dirty and vacuum
> increased in the intake, it would suck the piston down and it would
show red in a little
> window. I see my intake, pre-turbo has a schrader valve
(inoperable) in it which I assume is
> for testing with a vacuum gauge. Do other people have that? If
not, what are the options?
> With filters at $80 it's nice to have a test before replacing.
>
> Kerry
> 82 FC 35
> Denver
>