trinituner.com

Good morning all, I recently got a 2014 RORO Swift. 1.2 K12B Dualjet engine with CVT Transmission, mileage approx 17xxx km. The issue is that the car stutters and jerks on pull off. It also stutters/misfires on the highway at cruising speeds (between 60-100km/h). I serviced throttle body, replaced spark plugs (zxu20pr11), put in an entire bottle of red line, changed engine oil, changed transmission oil (amsoil green 2) but the problem is still there. air filter is good.
Any advice??

also cleaned MAF

Dualjet engines require premium. Fill up on premium and add an octane boost. Let me know if this works.

Coil packs could also be part of the problem. Maybe if you do a diagnostic scan as well.