Liana- a head ache to me

hey guys..its been a long time since i posted something to pw...anyways coming to my problem.
i hav a liana, and so far hardly its been 2 yrs since i bought it brand new. the problem is its missing and no acceleration. i'v to push the accelerator and leave the clutch accordingly to give it a push to run along lol...and its not dat easy doing it in my liana
the first time when it started this problem i showed it to many mechanics but they refused sayin ke ye electronic cng wali gari hay. then i turned to the company and they acutally couldnt come up with a solution. what they told me is that the size of the valve is smaller than it should be.they just refurnished the valves and the car was ok. then again after a few months the same problem started, even worsened the running of the car, the missing problem was so intense that it was hard to drive the car normally . i approached different showrooms, but of no help but one said the sensors are weak and finally soon after dat one day the car stopped overheating seizing the engine and ruining the pistons! i sent the car for an overhaul and costed me heavy! now the technicians at the company did not know what to do lol and couldnt figure out how to solve , and though the sensors costed heavy and they said they dont hav them or something and couldnt place them properly to function and crap! so they made the radiator fan direct. even they refurnished the valves and i guess made a minor incresement in the size of the valves upto recommended by the company! then the car again got fine and now again its been few months the same problem persists!! this is my sad story lol...and we dont even use the AC coz even without it ,its hard to drive the car and accelerate it! i dont knw if i'v been able to make my point but can u guys relate it n help me out wif sumthing


and i should tell its done more than 80000 kms in 2 yrs, the monthly running of the car is high and oil change is done after every 5000-7000 kms!! sometimes dat even increases!