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Discussion Starter · #1 ·
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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Master Baiter
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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.
 

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Æternum
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15,864 Posts
To further clarify, it's MAP minus Ambient pressure. Technically "boost" is not measured directly.

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