i took my air filter box out of car to service it than suddenly idea came to my mind why not using its external air inlet for air filter chock that filter needs to be replaced or clean.
first i took my air filter housing.
red marking is the external air inlet which i had used........
than the fitting and instrument used for the purpose...............are.....
now the following pictures shows that filter is working OK
and next pic shows that filter is chock, need to be replaced or clean
