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Where is the boost read from on a Cobb Accessport

4277 Views 4 Replies 4 Participants Last post by  MainFrame
This seems like a goofy question but where is the vacuum/boost read from on the AP if I have an EWG set up?

I thought the reading on the AP came from the boost solenoid but since its not receiving pressure from the turbo I guess it doesn't read it from there.

Just a curious thought ?
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MAP sensor
EJ257 said:
MAP sensor
Let me clarify...

The AP reads all of its information from the ECU. The ECU reads boost pressure from the MAP sensor.
To further clarify, it's MAP minus Ambient pressure. Technically "boost" is not measured directly.

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