Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
iatn subscription gives access to thousands of both good and bad waveforms. Also, when you buy a Picoscope you get a bunch of good and bad waveforms. Buying from autonerdz gets you even more. A quick Google search can give you information about how to test a map sensor and even show you what you'd expect to see in a waveform.
Generally a map sensor will run off a 5 volt reference with near 0v or 5v at 0in or 30in. Confirm power/ground circuits, confirm baro/map correlation koeo, confirm map signal by open/short, gradual sweep with intake pressure change. Map sensors don't necessarily have a consistent waveform, not compared to something like a crank sensor anyway.
The following user(s) said Thank You: Tootalltocare
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