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It should definitely have a mass air flow sensor. It's job is to tell the ECM the amount of air in grams per second (g/s) or milligrams per stroke (mg/str) the engine is drawing through the air intake. This figure is the total weight of the air.
If someone has deliberately removed the MAF for whatever reason then the ECM will not be able to determine air flow and will assume a fixed value instead. The engine management lamp may be on and a fault code relating to Mass Air Flow and Intake Air Temperature may also be present unless the ECM software has been adapted to ignore these input values.
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