Santro plus giving small jerks in 2nd gear plus no pick with AC on

[RA_Kazmi]

I have noticed today that my santro plus started giving small jerks in 2nd gear when i shifted from 1st to 2nd and slowly applied accelerator. It started happening today after i started my car after 4 days of standing and not being driven. I drove some 25-30 kms and intermitently this problem of small jerking in 2nd gear surfaced. I also noted that pick when i turned on the AC was completely down in 1st and 2nd gears though later on it would slowly pick up in 3rd and speed up.
my spark plugs are new, as i installed NGK santro recommended plugs about 4 months ago and car has hardly done 1500 kms on these new plugs. Similarly air filter is also of hyundai genuine and was replaced 4-5 months ago.
can anybody guide me to the most probable reason for these light jerks in low gear and completely low pick on AC while in lower gears.
thanks

[hash4u]

on cng only?
engine check light off or on?

[RA_Kazmi]

On cng only. I dont drive too much on petrol. Check light engine is on when the car is on cng but off whenever its on petrol. An electrician once told me that this check light will always be on while on cng because emulator is not installed

[kashifriaz69]

If u r santro is EFI then install an Advancer on it or if already is dere den chk is it working properly .........

[imranLakhani]

its a guide of santro .. u can easily solve ur problem in just one click ..

Hyundai Santro Plus For sale in Lahore - Free Classifieds in Pakistan 15 Aug 10:32

[hassan0072012]

Same problem faced by me Santro 2001. I went to my mechanic Shahzad at 8 no Chungi he checked deeply then traced fault. Engine base (place where engine joined with body frame) two screws are broken. Jerk is due to engine joints are free from one side.
Total Charges 6000 and mechanic spend whole day to repaired damage nuts.

[Hassan1991]