Need help! Cefiro owners..

[romeocefiro]

My engine will stop when slowing down. The mechanics says it might be Throttle body / air flow sensor problem. Because sometimes it disturb the timing when stops at junction. I've changed all necessary parts but my car still like 'semput'. I went to Tan Chong but the computer did not find problems but air flow. i changed the sensor too. But the engine still no smooth like before..please help! tell me what is going on!...tq