Salaaamz ...i have a nissan march 2002 and yesterday i installed cng kit in it baaqi pick shick or performance to theek hai but chalte chalte aik dum pataaaakha maar ke band ho jaati hai ...i have changed all the spark plugs but abhi bhi prolem solve nahin hui hai .....and even the person who installed the cng despite warranty is not entertaining me well neither rectifying the problem...also suggest good efi mechanics in rawalpindi islamabd for my nissan march i am really tensed
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