Thanks everybody for the suggestions.
The TPS is driven by wire. And like everyone suggested, mechanic has pointed out that Throttle body seems clogged. Lowering the RPM through cable adjustment didn't work well. And car's missing and running like a donkey cart.
It was evening, so throttle body wasn't opened. Will fix it tomorrow, IA
Also the silencer gone bad near the point it is connected with engine. So that's also one reason for poor performance.