map sensor

By remsr
July 20, 2006 in 1999-2013 Silverado 1500 & Sierra 1500

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remsr

Posted July 20, 2006

what does the map sensor do ? if it is bad will my truck bog down after its warmed up when you drive it . 4.3 v-6 1996

It is the "Manifold Absolute Pressure" sensor. Basically it measures the difference between the pressure inside the manifold(vacuum) and outside pressure. It calculates load based on this and the ECU can then change timing and mixture.

Mike

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