AA the car is suzuki liana 2008 RXi. mechanic changed spark plugs and cleaned throttle body. now the car is acting strangely
1. Rpm used to stay at 750-800 at idle but now it stays a bit above 1k
2. RPM drops slowly from from 2000 to 1k on startup even when the car is warm.
3. rpm jumps up to 1.5k when ac is turned off and then slowly comes back to 1k. the rpm needle used to stay perfectly level at 750-800 before tuning.
i dont wanna rely on mechanics so kindly help me solve this issue. thanks