I have Santro Executive (Model 2004) running on CNG/Petrol.
Six months back, on each starting-up in the morning, considerable water drops from the silencer were observed daily. According to my understanding, this was a good sign regarding the health of the engine.
But, nowadays, whenever its spark-plugs are checked physically, they are found dirty with carbon. The intensity of carbon deposit on the spark-plugs is in the following order:
a) Spark Plug on the extreme right near Ignition Coils: Badly Dirty
b) Other next to its left: Less Dirty
c) Next third on left: Lesser Dirty
d) Plug on extreme left: Clear and Brown in Colour
Can someone please explain that what is this phenomenon?
As a temporary measure, I have to clean one or two plugs on right side (near ignition-coils) from time to time to keep the vehicle on road.
Please guide.
Thanks!
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