I got wagon japanease model 2015 ene charge import
2018. At start up and idle rpm is all fine. However rpm
changes by +_ 300 rpm during drive. Causing changes in
rpm along with mild jerks in movement of car. I did
following things
1. CAT converter change (on automatic machinr)
2. Original spark plugs newly installed
3. Coils changed
4. Fuel filter thoroughky cleaned
5. Throttole body fully cleaned up
6. Gear oil changed
7. No actice fault code shown on scanner
Engine pick and acceleration is absolutely fine with
mileage app 20 km/l
No problem with Gear as per mehanics because gear
shifting and acceleration is smooth
Need expert onion piz