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Thread: Hyundai SANTRO factoryfitted CNG problem HELP

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    Default Hyundai SANTRO factoryfitted CNG problem HELP

    Dear Friends I am encountering problems with my santro cng. when the engine is cold and I start it the car has started knocking and dies down(shutoff) . the mileage has also decreased considerably it use to give 90(A/C always on) kms for 5.5 kgs and now it gives 78 kms. (A/C always on). I am new to efi I dont know a good place for tuning pls advice. the only authorized dealer left in karachi for santro is apollo motors. others are there but I phoned the company they said that they are not authorized and existing in thier own capacities. apollo is overload with work any suggstions are welcomed

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    hello!
    this is the problem when the car is cold....u said it knocks???so On CNG i did'nt listen any car knocking.....what do u mean by knocking car take jerks and engine stalls(shutoff) or it knocks like petrol....also tell that when car was on normal operating temp whats the condition there....does car vibrates there or stalls there.....what about car pickup..does it down...and on slow speed on 2nd gear does it gives jerks when u try to accelerate on slow speed.
    just answer the question so i can suggest what can be the problem.
    Thanxx

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    Do you start it on CNG or Petrol...And whats your cars mileage ?

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    comon man knocking on cng, get ur efi sensors checked, might be some problems with them, yup it starts on petrol there u can have knocking , wots point in knocking on cng, if some body experienced tht too lemme know abt it aswell, thnx

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    Default

    My spectra used to do the same, knocking is because of advanced timing on CNG and its not the same as Petrol. u need a good CNG adjustment. thats all. i could have helped u a lot if u were is Islamabad, my cousin is in Karachi, his workshop is in Zamzama. if u want to contact, his name is Muzammil and his # is 03332170727, just tell him, Saqib from Islamabad gave u this #, he will surely b of help.
    Keep a cool head and wear seatbelts!

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    spectra - I live in islamabad and need your help - need to convert my xli to cng, i heard melody guy is the best one for this? what do you suggest
    -

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    i have heard about that melody guy, he has good reputition. i have a friend in Aabpara, he used to work for Pak Suzuki and TWin City. He is also good, if u want i can give u his contact.
    Keep a cool head and wear seatbelts!

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    Well guys i have city 97 Ex and that vibrates too on cng, its whole body jerks/vibrates and when we release the accelator the engine stalls, this problem, however, fades out after a while having covered a distance of few miles. Besdies, as mostly the car is used on cng, when it is switched to gasoline it produces jerks and too much vibrations. please guide what to do?

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    @timeport: when engine attains its optimum temp then vibration stops, it's normal. But if there is too much vibration then u probably are having a very low engine idling RPM. get ur engine tunend for CNG settings.
    u didn't mention any starting trouble, so i assume valve clearance is okay, if tappets are hard so u might have to do a lot of cranking in morning. otherwise check timing and get it adjusted appropriately.

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    Spectra - Can u give me the contact info for both the guys (melody and aab para). My Santro runs fine on CNG but when I switch it to petrol the engine starts revving up and down. I hope they can help.
    Thanks

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    Yasers-your car's ISA (Idling Speed Actuator) needs servicing. u can get it done from Twin City Motors. But u have to tell them sepcificaly, also get the fuel pump checked. The problem is not with CNG setting, so these two persons cannot help u much.
    anyways i have the number for Aabpara person named kiani
    03335138841
    Keep a cool head and wear seatbelts!

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