Sorry about the delay, was searching the Market to see if someone has a used 3 Wire Pump. One used is available for Rs. 2,000 but no warranty.
Anyway, I checked the Registration book, there is no information about the Engine Type, just says it is Suzuki/SEDAN, Year of Manufacture is 1993, 1297 CC, not sure if it helps.
I have also attached a picture if that helps to identify.
I also noticed that the Voltage getting to Fuel Pump through CNG Valve Control is about 12.3V, however on Battery it is around 14.3V. Should I try to add another Relay and Juice the Pump directly through Battery and Powering up the relay from CNG Valve Control?
Right now, the Fuel pump runs for about 20-25 minutes, then heats up and shuts down.