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2000 Acura Integra GSR MAP Sensor Reading Backwards


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I have a 2000 Acura Integra GSR (B18C1) and upon recently investing in a scanner, I have found that the computer reads the MAP sensor readings backwards. I have a mechanical vacuum gauge hooked up in the cabin that shows proper vacuum at all the right times, I have purchased another sensor that reads the same, I have tested the sensor with a vacuum pump, and I even tried reversing the 5v / signal connections thinking maybe a previous owner did a bad wiring job. That made it read even more off.


There has been no alteration to the extent of my knowledge to any of the wiring including any sensor circuit (except for the IACV - the Edelbrock Performer X Intake Manifold pulled it so far away the wires needed some extension.)

I'm out of ideas and there's nothing online regarding this! Please help me.

Thank you thank you!

PS - I have been planning on getting my car tuned and therefore downgraded to OBD1. If I do this then does that void the necessity to figure this out?

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