Recently i went to mechanic for flushing and replacement of power steering oil. Moreover, i got the carburettor cleaned with carby cleaner and got the tunning done on petrol. Before this activity car was drinking petrol.... 5 km/lit... also it was giving dark smoke with half burnt petrol smell in cabin. After the tuning black smoke has reduced and that half burnt fuel smell is gone. i am checking its mileage now on petrol. During this whole activity i noticed that engine sump seal got leaked. Got it changed and saw that seal between engine and gear box was also leaky. Got it replaced too and as for this seal whole gear box was required to be removed so utilized the chance to get the clutch plate and bearing replaced too as they were noisy. After this whole episode the problem which i am facing is that
1. if i accelerate the car quickly i hear engine knocking which progressively finishes when car gets momentum.
2. second thing is that when car is cold shifting to 2nd gear is quite difficult which smooths after the car attains nominal temperature.
NOTE: Car is also on CNG. i hav removed air blockage as i want to first get best results on petrol. i.e good mileage without knocking. Plz advise...
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