Can you post a pic of this advancer? The CNG wala was also mentioning that there is a device which may not be working he wasn't able to pronounce the name, was he mentioning this advancer?
And also my car was parked from 1:30PM and I tried starting it again on 4:15PM but it didn't start on CNG. And I could hear the 'TICK' sound very lightly. Not like how it normally sounds.