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 ??