Nissan Ex Saloon 1.3 2001 model,not picking up speed(with gasoline or CNG) with AC or without AC,Already changed the GearBox,FIXED A NEW ONE, Changed the Circuit Box(Engine ECO), Checked the wiring of the whole car,what to do now? LOCAL NISSAN SERVICE CENTRE In Chittagong,Bangladesh could not find out the fault.What should I do now? I have attached two images of same car as mine.Can you please give me some suggestions,I am great difficulties after buying this car,Please let me know what to do.Thanks.