I had just purchased mehran and it was running on cng only as its switch was not working, when my mechanic changed the switch it was empty on cng and only petrol was in it. Today morning when i filled the cng but didnt convert it to CNG , car didnt started , mechanic is saying that cng enters the carpreter even its on petrol , so if you cng than you have to fully consume cng and then can go to petrol.
As per him system of cng is not working properly.
Any body can help?