Salam all brothers.
I have cultus 2011 efi which is having problem of jerking back and forth in following two circumstances.
1. when ever i depress / release accelerator (without pressing clutch pedal).
2. when just little press accelerator (little means barely).
And also I noticed my car starts up with 2000RPM at idle and slowly goes down to 1000 or 1100 within idle.
But during driving some times
1. rpm goes down to 600 while pressing clutch for up shift or down shift
2. rpm maintains at 2000 while pressing clutch for up shift or down shift
Last week I was just fumbling in side the bonnet with engine started, found that air intake hose was causing rpm fluctuation. overhauling and re seating air filter ended up with the issue at that time. but the problems listed above are still persist.
Note: Car runs on petrol mostly and these issues are on both fuels.