@rozz, yahan to log tmare peeche hee par gai, but u mayb right, nd yes do tell ur relatives to try this, as SUZUKI GENUINE NGK plugs cost around Rs980, and Bosch ones cost around Rs. 900 to 1300 depending. nd its obvius that 4pins generate a relativly higher spark then those of 1 pins ones
@all, the pin thing, i tried was i tried a bit ov logic, coz this mis,firing issue is only on CNG, and not petrol, which means less power on CNG, so to increase the spark the only easy solution is 4 pins so now its AAAokay.
and belive me if u change ur cars plugs every 20k miles nd clean em every 10k miles, ur Baleno wont mis-fire at all.
@ all, one thing Baleno can realy be a pain in the neck if sum dhakkan touches it, as ^haseeb said, and vise wersa. so u need to be careful, as this car is a bit more complicated then Margalla, Khyber, an Mehran. 
and btw Balenos Misfirring issue led Suzuki people to go for SIS kits in Liana's
they shud have continued the distributor system alteast for CNG cars, as in 99 Balenos
