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Thread: Cultus CNG conversion problem (Very urgent)

  1. #1
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    Default Cultus CNG conversion problem (Very urgent)

    Salam guys,

    I have cultus vxli model 2008. The car is running smooth but the only problem i am facing that when in morning it gets converted from petrol to CNG after 90 secs the engine stops no matter how much I push the accelerator. It happens only in morning or if I don't start the engine for 1 or 2 days. Sometimes it converts but sometimes not even after retries so then I drive it on petrol at that day. I am just fed up from this.

    Here i would also like to mention that when engine gets started on petrol in morning. Its RPM is above 1000 then slowly they drop down to 1000 and then lil bit below 1000. Is it normal?

    Today I am going to the workshop so please advice me that what could be the problem because I don't want to pay extra money to mechanic.

    I am waiting for the replies. Please it is urgent. Hopefully I will get some replies till afternoon

    Thanks again


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    12 views and no replies? cmon atlest there should be some one to identify the problem :-/

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    well ..
    seems like u have some prob in ur conversion switch .. take it out and observe the grip it might be slightly burnt due to loosing ..

    yes RPM drops after the engine warm up .. its normal .. but not continuously dropping ..
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    duplicate post ***** deleted****
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    Thanks scorpion for the reply. But don't you think the throttle body needs to get clean?

    Because if it is a switch problem then the CNG conversion shouldn't work every time although the conversion just works fine except morning.

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    Quote Originally Posted by irfan121 View Post
    Thanks scorpion for the reply. But don't you think the throttle body needs to get clean?

    Because if it is a switch problem then the CNG conversion shouldn't work every time although the conversion just works fine except morning.
    could be the throttle body issue or could be the cng conversion switch problem as scorpion mentioned , either way u have to go to a good technician , about rpm high in the morning its normal cos of auto choke , hope it will help !!
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    Quote Originally Posted by irfan121 View Post
    Thanks scorpion for the reply. But don't you think the throttle body needs to get clean?

    Because if it is a switch problem then the CNG conversion shouldn't work every time although the conversion just works fine except morning.
    dear poster it could be either of the fault , faulty conversion switch , it works some time and it dont work some time , or it could be the throttle body issue aswell , about the high rpm in the morning dont worry its normal , its because of auto choke !!
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    multiple post ***deleted****

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    Quote Originally Posted by shqamar View Post
    dear poster it could be either of the fault , faulty conversion switch , it works some time and it dont work some time , or it could be the throttle body issue aswell , about the high rpm in the morning dont worry its normal , its because of auto choke !!

    Thanks bro to clear it up. But i was thinking that if there is switch issue then why don't it get trouble in afternoon when i get back to home from office. It never gave trouble during afternoon.

    Secondly, do you know any good mechanic in Islamabad to consult regarding conversion switch and throttle body issue?

    Previously i told to mechanic about this problem and he told me k kachra ajata ha and need to get clean but i think it is not an issue.

    Any one know any good mechanic in Islamabad to consult regarding conversion switch and throttle body issue?

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    CNG switch may be faulty, and the RPM at normal engine temperature should be 800
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    Quote Originally Posted by roms View Post
    CNG switch may be faulty, and the RPM at normal engine temperature should be 800

    Thanks for the reply. But it is not a manual switch. Car has efi engine and converts to cng automatically

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    Get checked CNG kit coil, a piston in it might needs replacement. I was also facing this issue and get resolved after replacing the piston in Rs.300
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