Volvo tuning is the process of streamlining the car's engine operations toward its maximum power output. It generally involves facilitating the delivery of air and fuel into the combustion chamber, and of the precision spark timing that lights up the burn materials. As both of these engine operations are directed by the on-board electronic control unit in the Volvo, streamlining the fuel delivery and spark timing systems simply involves the replacement of the stock-fitted ECU chip with a Volvo performance chip. An alternative is a slew of car modifications, which often include the tedious task of changing carburetor jets and distribution curves. The Volvo performance chip boasts of a power upgrade without the need for further car add-ons and parts replacements. The Volvo performance chip is designed to enable drivers manipulate the engine's lookup tables, which dictate the Volvo's required engine operation input in a given drive application. When the Volvo is revved up, the car's ECU measures the values gathered by a network of car sensors, like the oxygen sensor, air mass meter, etc. The Volvo performance chip then feeds the ECU with information on the appropriate fuel injection rate based on the values gathered by the sensors. With a little tweak on the lookup tables in the on-board computer, the Volvo performance chip optimizes the car's engine operation toward maximum performance. The spark timing of the Volvo ignition system may likewise be optimized to harness more horsepower. A spark that is generated during an appropriate time boosts power production and prevents fuel wastes. Engine misfire, on the other hand, doesn't just waste fuel; it may also result in engine system parts damage, like busted HT leads, fume buildup in the exhaust system, etc. Unlike car manufacturers, who place emphasis on vehicle reliability, mileage and emissions control, most manufacturers of aftermarket Volvo performance chips utilize more aggressive settings in the fuel and spark timing maps to further make the engine more responsive to high performance driving conditions. These settings, however, are typically revocable and can be set to suit which part of car operation the driver wishes to optimize.