Tata Safari Storme loss of power

See if this helps , Model: Tata Safari Year: 2004 Main features, safety and ecconomy Engine size: 1948 ccm (118.87 cubic inches) Fuel type: Gasoline Drive: 4WD Transmission: Manual, 5-speed Engine and transmission Displacement: 1948 ccm (118.87 cubic inches) Engine type: Inline, 4 cylinder Max power: 137.00 PS (101 kW or 135 HP) at 5530 Rev. per min. Max torque: 181.00 Nm (18.5 kgf-m or 133.5 ft.lbs) at 4500 Rev. per min. Fuel system: Injection Gearbox: Manual, 5-speed Model: Select a model2000 Tata Indica Diesel2000 Tata IndicaTata Safari Bodywork Type: 6/7S ORV Number of doors: 5 Dimensions Wheelbase: 2650 mm 104.33 in Track front: 1500 mm 59.05 in Track rear: 1470 mm 57.87 in Length: 4810 mm 189.37 in Width: 1810 mm 71.25 in Ground clearance: 205 mm 8.07 in Kerb weight: 2040 kg 4497.42 lb Fuel capacity: 65 l 17.17 US gal More Tata technical data: Engine Type: 4-S Bore x stroke: .00 mm. × .00 mm. Displacement: 1948 cc 118.87 cu in Aspiration: Turbo D. Intercooler: Y Max. output: 91.2 PS (90 bph) (67.1 kW) @ 4300 rpm Max. torque: 186 Nm (137.1 lbft) (18.9 kgm) @ 2500 rpm Coolant: Water