Here's the situation (actually my bayaw's situation)

Brought the car to casa two weeks ago to have the MAF cleaned and throttle body cleaned, because of rough idling and sometimes car is stopping in the middle of the road after coming from a full stop. After the cleaning everything is perfectly well especially the idle.

After a few days tumirik na naman, he bring the car to shell customer cradle. The mechanic saw that his air filter is dugyot na pala (Ford Libis idn't saw this, what a service). Possible ba na ito ang cuase ng pagdumi ng MAF at pagtirik sa kanya?

I am suspecting kasi na this is the culprit. So I advice him to havethe MAF cleaned again instead of buying a new one, kasi nadiagnose sa isang autoshop na may diagnostic tool na MAF ang problema. And after pacleaning test drive with the mechanic and have the MAF sensor diagnose again with the computer What do you think guys?