Thanks for the reply Joey.
I think if the vehicle is immobilized due to alarm system, then the fuel should not flow in the first case. But in our case, fuel is flowing, fuel pump is working. So alarm might not be the reason for it. But will make sure by doing what you have suggested.
Where ECU is concerned, we have installed a new ECU and programmed it with the latest software. But still no solution.
Can anyone suggest how to carry out a test to make sure crank and cam sensors are working fine ?
Any other suggestions what should be done ? We really need to start this vehicle now. This vehicle is really making us crazy.