It's strange that your barometric pressure readings are fluctuating so wildly, especially since the barometric pressure sensor in the MAF should provide a relatively consistent reading as atmospheric pressure doesn't change that quickly or dramatically under normal circumstances.
Given your description, a couple of potential issues come to mind:
1. Faulty MAF Sensor: Since the barometric pressure sensor is located in the MAF on your Evo, a faulty MAF sensor could be causing inaccurate readings. You may want to check the wiring and connectors, clean the sensor, or potentially replace it if it's faulty.
2. Software Glitch: It's possible that there might be a bug or glitch in the software you're using. Try using a different software, if available, or updating/reinstalling your current software to rule out this possibility.
3. Incorrect Parameters: Make sure you're reading and interpreting the data correctly. Make sure you're using the correct units, and that the software is correctly calibrated for your specific vehicle and its sensors.
Given your description, a couple of potential issues come to mind:
1. Faulty MAF Sensor: Since the barometric pressure sensor is located in the MAF on your Evo, a faulty MAF sensor could be causing inaccurate readings. You may want to check the wiring and connectors, clean the sensor, or potentially replace it if it's faulty.
2. Software Glitch: It's possible that there might be a bug or glitch in the software you're using. Try using a different software, if available, or updating/reinstalling your current software to rule out this possibility.
3. Incorrect Parameters: Make sure you're reading and interpreting the data correctly. Make sure you're using the correct units, and that the software is correctly calibrated for your specific vehicle and its sensors.
