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I got a petrol swift 8 month back. i installed a CNG kit in it and every thing was perfect till few days. Now what i am facing is a missing sound coming from the bottom of the car in CNG but there is no sound while driving in petrol. My mechanic has changed the spark plug but still the missing soung in there. Pls help...

By Kamal on Jul 14, 2009


  • Expert Hi,
    There can be problem inimproper supply of fuel while driving with CNG.It needs to be checked by CNG repair center.
    Answer by Shiva Shankar on Jul 17, 2009

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