There is nothing to clean in this sensor. The sensing element is sealed in a protective gel. Spraying any chemical inside it will lead to its failure in the near future. This sensor measures intake manifold vacuum to calculate load on the engine. For years the biggest problems were caused by leaking vacuum hoses. To address that, Chrysler plugs them directly into the intake manifold or the throttle body assembly. You still must consider other vacuum leaks though.
The best way to approach this is to connect a scanner so you can view live data and see what the engine computer is responding to. For example, if the engine is warmed up after driving at highway speed, the coolant temperature sensor should be reading close to 195 - 200 degrees. The intake air temperature sensor should be reading very close to the actual outside air temperature sensor. The MAP sensor's readings can be viewed the same way, but it is hard for a person to analyze its readings because a very small change in signal voltage causes a large change in the fuel metering calculations. Failure of these sensors is very rare, but the best way to determine if it is causing a problem is to replace it. The readings have to go outside of specific preset limits to set a diagnostic fault code related to a MAP sensor, but a running problem can develop if the sensor sends an incorrect signal voltage that is still within those limits.
Tuesday, February 20th, 2018 AT 7:23 PM
