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Where is the mass air flow sensor on a 1993 Chevy s10 4.3 L blazer?

The Mass Air Flow (MAF) sensor on a 1993 Chevy S10 Blazer with a 4.3L engine is located in the air intake tube, between the air filter housing and the throttle body. It's usually a relatively small, rectangular sensor with a wire harness plugged into it. You'll likely need to trace the air intake tube from the air filter to find it.