meray pass vitz 2000 manual with cng hai is main aik problem aa rahi hai "backfire" bohot ziyada mera air filter jal jata hai koi janta hai aisa koun hota hai plzzzzz
this problem has been addressed before...so in due time someone will tell u the solution..in case if someone doesn't there is a thread named"CNG problems"..ask the dude in that thread..hes good..he'll tell u