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Q: where is the massive airflow sensor located on my 1993 chevy lumina on 1993 Chevrolet Lumina

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also had diagnostic on 1993 chevy lumina the code was 33 which means map sensor or massive airflow sensor or both but cant locate the massive airflow
(1) Answer
Your vehicle has a MAP sensor only. Usually located on top of intake little retangular box(black) with a vaccum hose and a connector.