My cousin has got liana 2006 being run only petrol. The problem we are facing that it seems underpowered in 1 and second gear as if 10 ppl sitting in the car. (With Ac). However things get better a little bit after 3 gear shift but overall lacks power which it use to have.
Oils have been changed. Tyre pressures are ok. W/o ac performance gets little bit acceptable.
Kindly guide me.