@aryaan1
go first get your car service with new oil,filter, if its 2003 then better change spark plugs & plug wires then go for complete tuning,complete open cleaning of carburetor, tell mechanic to tune on both conditions
1. on petrol with a/c off
2. on petrol with a/c on
( if you have cng then tune on both cng & petrol with & without a/c)
- on cng with a/c off
- on cng with a/c on
in such a way that in all 4 conditions rpm should be stable at 1.1 K (without pressing accelerator, it should start,stop) it should start in 1st self with constant rpm
these alll are interlink with each other & tuning issue