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Thread: CNG Automatic Corolla 2003 - Engine Valves burnt ?

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    dare2dream's Avatar
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    Default CNG Automatic Corolla 2003 - Engine Valves burnt ?

    I have a 2003 Corolla SE-Saloon Automatic. I installed CNG 2 years ago and after installation of CNG more than 60,000 kms driven.

    I'm facing a problem from last many months, on CNG the car is siwtched off, mostly on signals when brakes are applied.

    A little research and checkup from Toyota revealed that this is common problem in automatic saloons converted on CNG.

    According to sources the Valves of engine are burnt and need to be replaced.

    I need an expert advice, anybody else having automatic corolla facing similar problem ??

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    spectra's Avatar
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    It can happen to any car but not common. This means that combustion temperature is excessive. Can be wrong plug heat range, over advance timing or inaccurate mixing of cng.
    Keep a cool head and wear seatbelts!

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    Never used cng and automatic car working fine, it need new set of plug wires but too lazy to go purchase, it still goes 160km/hr without problems with bad wires. no problem with engine without cng.
    ,,, unless you know the track, you're not good enough to sit behind the wheel." K T

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