assalam-o-alekum frnds.
i took my air filter box out of car to service it then 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
its work on vacuum principle, when filter is chocked, carburator will try to suck air from the external port where i had installed this instrument, when it is copletely vacuumed, the red marking will appear parmanently whether u switch off ur car. it can be normal by pressing a switch on top of it
the further procedure..................
smoothing the surface
n the final outcome
hope u guys like it................