Going for 2nd service on my car, and recently I was having unstable engine startup, instead rev up a little like normal, it works like out of breath a while the stable on idle.

I asked the mechanic about the problem, he tried to clean my throttle body and reset my ECU. He advice me to change back to stock filter as my Works drop in filter will cause the air enters too fast on engine starts therefore it sot.

Is that for true? Now I'm trying switching to stock air filter and test a while first after that switch back to Works drop in.

Nope they didn't, they're not that hardcore people.

Mentioned to them, they just clean the throttle body and reset the ecu only, ask me test with stock filter first.

Possible sensor problem that cause it?