Thanks Keith, I have not changed the fuel filter. Where would it be located?, usually in M800 it would be near rear suspension. Any clues will be helpful.
The spark plugs are below the inlet manifold, even the fuel injectors are above the spark plugs, getting them out will surely be a cumbersome task, I scared of damaging the threads for the plug mounting. Moreover with everyday passing I am just being greeted with new problems. I had no answer this morning when my friend asked me about the source of jerking issue & how it started all of a sudden.
Some times when dealing with such cars, I just feel how simple, humble & DIY friendly our lovely M800 is. No comparisons in other areas though. This Palio seems more like a mechanic's nightmare, I felt this when I asked a local mechanic shop to clean fuel injectors & change handbrake cable, I was the first customer yesterday morning & he replied that a spring & a locking nut is required which usually gets worn out in Palio, if that is not replaced then the handbrake wont work smoothly, he cant write the name of the part, spares shops dont have those stocks, the willingness itself is very little with mechanics when it comes to Palio, Petra, Siena, Cielo, Astra, Corsa etc.
Still waiting for the tail lamp.