Its Cultus VXRI 2007 with Company fited CNG and has done about 30,000kms
1) On applying Second Gear or after sudden acceleration the RPM, on return, drops to Zero and car switches off. ON apply second geat it also sounds with a jhtka "Karitch" What is this Kritch. Sound just like when you turn the AC ON. This is with 2nd gear only
2) at speed of 60 and above, there's a Ghurrrrr Ghurrrr continious sound. What might be this? Tires? I cheked bearings, they are ok.
Help please