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By monitoring intake manifold vacuum MAP (Manifold Absolute Pressure) sensors are able to measure the amount of load being placed on the engine. The sensor relays engine load output to the ECU, which in turn adjusts fueling for optimum performance and economy.
WARNING: This product contains chemicals known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov. 