Maruti Service Masters, Maruti Chennai regional office, Shri Subbaraj.
The engine is OK at idle. But at around 1000 to 1200 RPM, the engine fluctuates by +- 50 to 100 rpm (hunting). This reflects on the pick up, shows up as jerky motions instead of a smooth pick up. The Maruti Service Masters have done tuning and replaced some parts. But the problem has sufaced again. The mileage also drops if this hunting happens. The car is OK at top rear. The jerky motion is clearly felt in 2nd gear. This fluctuation dies down slowly after 2500 rpm. Obviously when you are driving in city, you drive at 1000 to 1500 rpm and this hunting is irritating. During a recent visit, the MSM and the engineer from Maruti refused to even accept the problem and stood their ground that everything is fine with the engine.
Solution of your complaint
Replace the engine parts like on board computer, fuel injectors and or valves/tappets etc.