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GMTechBernard
GMTechBernard, Shop Foreman - GM World Class Tech
Category: Chevy
Satisfied Customers: 2158
Experience:  GM
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Submitted: 8 years ago.
Category: Chevy
Expert:  GMTechBernard replied 8 years ago.

The Ecotec engine does not use a Mass Air Flow sensor. Instead, it uses a Manifold Absolute Pressure sensor to help calculate fuel delivery.

Let me know if you have additional questions.