Bro was the car's engine overhauled completely? 80K is too little for this engine. It is a robust engine with timing chain and dual overhead cam. Mashallah my car has done 110K Km and still smokes brand new Corollas 
The most common issue with Liana's maintainance is valve clearance adjustment as it has Shims (tikkiyan) like turbocharged engines instead of tappets. Thos shims need to be ground to specific thickness for adjustment. Go to Suzuki Township or Master Motors near DHA and have those adjusted.
Tell them to grind the shims instead of replacing those as it will be cheaper. Second issue could be spark plugs. Install Bosch 4-tip plugs; they are virtually maintenance free.
Do not replace the coild just because people say they need to be replaced. Have those checked. Have the ignition leads checked as well.
Have the throttle body cleaned if none of the above works.
